More on the American Heart Association Check Mark program 11. June 2007 William Davis (3) Take a look at the list of foods on the American Heart Association's (AHA) Check Mark endorsement program (below). After I saw the list, I was convinced either that the people who designed the program are either startlingly ignorant, or the AHA simply does this for money.Many of these foods have nothing to do with health, heart or otherwise. In fact, many of these foods are prominent culprits that contribute to the American epidemic of obesity. There are cured meats with sodium nitrite (a potent cause of colon cancer). Some of these companies have been accused of unhealthy food manufacturing practices. Tyson Foods, for instance, has been in court many times defending their brutal factory farm practices and were the focus of a federal investigation for paying bribe money to USDA Secretary, Mike Espy. (Espy was acquitted but two Tyson executives were convicted, only to be later pardoned by then President Bill Clinton.)This is a smarmy list to be included on. Though there are some rare healthy exceptions on the list, from the Track Your Plaque viewpoint, this is a list of shame, foods that have no place in a genuinely heart healthy nutrition program. 8th Continent, LLC8th Continent Fat Free Premium Original Soymilk8th Continent Fat Free Premium Vanilla Soymilk8th Continent Light Chocolate Soymilk8th Continent Light Original Soymilk8th Continent Light Vanilla Soymilk8th Continent Premium Chocolate Soymilk8th Continent Premium Original Soymilk8th Continent Premium Vanilla SoymilkAmerican Italian Pasta CompanyGolden Grain Mission Whole Grain Penne RigateGolden Grain Mission Whole Grain RotiniGolden Grain Mission Whole Grain SpaghettiHeartland Whole Grain PenneHeartland Whole Grain RotiniHeartland Whole Grain SpaghettiHeartland Whole Wheat Angel HairHeartland Whole Wheat Elbow MacaroniHeartland Whole Wheat PenneHeartland Whole Wheat RotiniHeartland Whole Wheat SpaghettiMueller's Whole Grain PenneMueller's Whole Grain RotiniMueller's Whole Grain SpaghettiAtalanta CorporationCelebrity 99% Fat Free Premium Imported Healthy HamBeefmaster Cattlemen, L.P.Nolan Ryan's All Natural Ground Beef Round 96/4, 4% FatBimbo Bakeries USABimbo's 100% Integral/Bimbo 100% Whole Wheat BreadMrs. Baird's 100% Whole Wheat BreadOroweat 100% Whole Wheat BreadOroweat Country 100% Whole Wheat BreadOroweat Double Fiber BreadOroweat Original Health Nut BreadBoar's Head Provisions Company, Inc.Boar's Head Aroastica Seasoned Boneless Skinless Chicken BreastBoar's Head Blazing Buffalo Style Boneless Skinless Roasted Chicken BreastBoar's Head Branded Deluxe 42% Lower Sodium HamBoar's Head Cracked Pepper Mill Smoked Turkey BreastBoar's Head Golden Classic Oven Roasted Boneless Skinless Chicken BreastBoar's Head Hickory Smoked Black Forest Turkey Breast - 43% Lower SodiumBoar's Head Hickory Smoked Boneless Skinless Chicken BreastBoar's Head Italian Style Oven Roasted Seasoned Beef with Classic Braciole SeasoningBoar's Head Lemon Pepper Boneless Skinless Roasted 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Meat Solutions96/4 All Natural Extra Lean Ground BeefExcel's Tender Choice 97% Fat Free Pork TenderloinsExcel's Tender Choice Extra Lean Boneless Pork LoinOur Certified 100% Pure All Natural Ground Beef 96/4Sterling Silver Extra Lean Pork Tenderloins - 12% MarinationSterling Silver Lean Boneless Pork Loin - 12% MarinationChiquita Brands Company, N.A.Chiquita BananasClearwater Seafoods Limited PartnershipClearwater Frozen Arctic Surf ClamsCliffstar CorporationDeerfield Farms No Sugar Added 100% Grape Juice (Purple)Safeway 100% Grape Juice (Purple)Sam's Choice 100% Grape Juice (Purple)Walgreens 100% Grape Juice (Purple)Clougherty Packing CompanyFarmer John® California Natural® 4% Fat Extra Lean Ground PorkFarmer John® California Natural® Premium Extra Lean Boneless Pork TenderloinsMinute Maid Premium Blends - Orange Passion Calcium Juice-FrozenMinute Maid Premium Blends - Orange Tangerine Calcium Juice - FrozenMinute Maid Premium Country Style Orange JuiceMinute Maid Premium Country 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BreadCoolham Holdings, Inc. DBA SunMilk Dairy Co.SunMilk-Fat Free Milk with Sunflower Oil (The Taste of 1%)SunMilk-Fat Free Milk with Sunflower Oil (The Taste of 2%)Cooper FarmsCooper Farms All Natural Turkey Breast FilletCrider, Inc.Kirkland Signature Premium 99% Fat Free Chunk Chicken BreastDare Foods IncorporatedBreton Reduced Fat & Sodium Wheat CrackersEl Aguila Food Products, Inc.El Aguila Stoneground Corn TortillasEurofresh Inc.Eurofresh Campari TomatoesFPL Foods, LLC96/4 All Natural Extra Lean Ground BeefFarmland FoodsFarmland 97% Fat Free Fresh Ground PorkFarmland Nutrition Wise 97% Fat Free Boneless Center Cut Pork Loin FiletFarmland Nutrition Wise Boneless Butterfly Cut Pork Loin ChopsFarmland Nutrition Wise Boneless Center Cut Pork LoinFarmland Nutrition Wise Boneless Center Cut Pork Loin ChopsFarmland Nutrition Wise Boneless Center Cut Pork Loin RoastFarmland Nutrition Wise Boneless Pork Chops - America's CutFarmland Nutrition Wise Boneless Pork TenderloinFarmland Nutrition Wise Boneless Pork Top Round RoastFarmland Nutrition Wise Boneless Pork Top Round SteakFarmland Nutrition Wise Boneless Sirloin Tip Pork RoastFarmland Nutrition Wise Pork Cube SteakFarmland Nutrition Wise Pork CubesFarmland Nutrition Wise Pork ScallopiniFarmland Nutrition Wise Pork StripsFieldale Farms CorporationJewel All Natural 99% Fat Free Boneless Skinless Chicken Breasts with Rib MeatJewel All Natural 99% Fat Free Chicken Breast TendersOur Premium 98% Fat Free Boneless Skinless Breast with Rib Meat - 15% MarinationSpringer Mountain Farms All Natural 98% Fat Free Boneless Skinless BreastsFlorida's Natural GrowersFlorida's Natural Calcium & Vitamin D No Pulp Orange JuiceFlorida's Natural Growers Style Most Pulp Orange JuiceFlorida's Natural Home Squeezed Calcium & Vitamin D with Pulp Orange JuiceFlorida's Natural Home Squeezed with Pulp Orange JuiceFlorida's Natural Original No Pulp Orange JuiceFoodTech InternationalVeggie Patch California Veggie BurgersFoster Poultry FarmsFoster Farms 98% Fat Free Honey Roasted & Smoked Breast of TurkeyFoster Farms 98% Fat Free Oven Roasted Breast of TurkeyFoster Farms 98% Fat Free Oven Roasted Chicken BreastFoster Farms 99% Fat Free 100% Natural Boneless & Skinless Breast FilletsFoster Farms 99% Fat Free 100% Natural Boneless & Skinless Breast SteaksFoster Farms 99% Fat Free 100% Natural Boneless & Skinless Breast TendersFoster Farms 99% Fat Free Honey Roasted & Smoked Turkey BreastFoster Farms 99% Fat Free Oven Roasted Turkey BreastFoster Farms All Natural 99% Fat Free Boneless & Skinless Chicken Breast Tenders (8% Marination)Foster Farms Fresh & Easy 99% Fat Free 100% Natural Boneless & Skinless Breast FilletsKirkland Signature/Foster Farms 99% Fat Free 100% Natural Boneless & Skinless BreastsKirkland Signature/Foster Farms All Natural 99% Fat Free Boneless & Skinless Chicken Breasts (8% Marination)Fresh Express IncorporatedChiquita Apple BitesFresh Express American SaladFresh Express Hearts of Romaine SaladFresh Express Italian SaladFresh Express Triple Hearts SaladGFA Brands, Inc.Smart Balance Smart 'N Healthy Deluxe Microwave PopcornSmart Beat Healthy Fat Free Non-Dairy Slices - American FlavorSmart Beat Healthy Fat Free Non-Dairy Slices - Lactose FreeSmart Beat Smart Squeeze Nonfat Margarine SpreadGeneral Mills, Inc.Apple Cinnamon CheeriosBerry Berry KixBerry Burst Cheerios-Strawberry BananaBerry Burst Cheerios-Triple BerryBerry Lucky CharmsCheeriosCheerios CrunchChocolate Lucky CharmsCocoa PuffsCookie CrispCount ChoculaDora The ExplorerFrosted CheeriosFruity CheeriosHeart Smart BisquickHoney Nut CheeriosKixLucky CharmsMulti-Grain CheeriosOatmeal Crisp Crunchy AlmondOatmeal Crisp Hearty RaisinOatmeal Crisp Maple Brown SugarPillsbury Oven-Baked Whole Wheat Dinner RollsProgresso Healthy Favorites Chicken & Wild Rice SoupProgresso Healthy Favorites Chicken Gumbo SoupProgresso Healthy Favorites Chicken Noodle SoupProgresso Healthy Favorites Garden Vegetable SoupProgresso Healthy Favorites Italian-Style Wedding SoupProgresso Healthy Favorites Minestrone SoupTotal Cranberry CrunchTotal Honey ClustersTotal Raisin BranTotal with StrawberriesTrixWhole Grain TotalYogurt Burst Cheerios StrawberryYogurt Burst Cheerios VanillaHain Celestial Group, Inc., TheDeBoles Organic Ancient Grain PenneHealth Valley Empower CerealHodgson Mill, Inc.Hodgson Mill Oat Bran All Natural Hot CerealHodgson Mill Whole Wheat Angel HairHodgson Mill Whole Wheat FettuccineHodgson Mill Whole Wheat LasagnaHodgson Mill Whole Wheat PenneHodgson Mill Whole Wheat Spinach SpaghettiHodgson Mill Whole Wheat Whole Grain ElbowsHodgson Mill Whole Wheat Whole Grain SpaghettiIndiana Packers Corp.Indiana Kitchen All Natural Boneless Pork Sirloin RoastIndiana Kitchen All Natural Pork TenderloinInterstate Brands CorporationHome Pride Whole Grains 100% Honey Whole Wheat BreadHome Pride Whole Grains 100% Whole Wheat BreadMerita Country Whole Grains 100% Whole Wheat BreadKFP International, Ltd.Kedem 100% Pure Concord Grape Juice-No Sugar AddedKansas City Steak CompanyKansas City Seasoned Beef Chuck Tender SteakKansas City Seasoned Beef MedallionsKashi CompanyKashi Heart to Heart Honey Oat WafflesKashi Heart to Heart Honey Toasted CerealKashi Heart to Heart Instant Oatmeal - 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Spaghetti StyleRonzoni Healthy Harvest Whole Wheat Blend Extra Wide Noodle - StyleRonzoni Healthy Harvest Whole Wheat Blend Pasta - LinguineRonzoni Healthy Harvest Whole Wheat Blend Pasta - Penne RigateRonzoni Healthy Harvest Whole Wheat Blend Pasta - RotiniRonzoni Healthy Harvest Whole Wheat Blend Pasta - Spaghetti StyleRonzoni Healthy Harvest Whole Wheat Blend Pasta - Thin SpaghettiRonzoni Healthy Harvest Whole Wheat Blend Pasta-LasagnaRonzoni Healthy Harvest Whole Wheat Blend Wide Noodle - StyleNonna's Kitchen, Inc.Columbus Reduced Sodium Turkey BreastNorth American Beverage CompanyChocolate Moose - All Natural Premium Milk Chocolate DrinkChocolate Moose - Cookies & Cream Premium Milk Chocolate DrinkMega Moose Energy Drink-Strawberry BlastNulaid Foods Inc.Nulaid ReddiEgg Real Egg ProductOberto Sausage CompanyKirkland Signature Premium Brisket Roast BeefOld Orchard Brands LLCOld Orchard 100% Grape JuiceOld Orchard 100% Grape Juice - Frozen ConcentratePOM Wonderful, LLCPOM Wonderful Fresh Pomegranate ArilsPOM Wonderful Frozen Pomegranate ArilsPOM Wonderful PomegranatesPackerland Processing Co., Inc.Meijer Extra Lean Ground Beef 96/4Peco Foods, Inc.Member's Mark All Natural Boneless Skinless Chicken Breasts with Rib MeatMember's Mark All Natural Boneless Skinless Chicken TenderloinsPepperidge Farm, Inc.Pepperidge Farm 100% Natural 100% Whole Wheat BreadPepperidge Farm 100% Natural 9 Grain BreadPepperidge Farm 100% Natural German Dark Wheat BreadPepperidge Farm 100% Natural Honey Flax BreadPepperidge Farm 100% Whole Wheat BagelsPepperidge Farm 100% Whole Wheat English MuffinsPepperidge Farm 100% Whole Wheat Hearty Texture Whole Grain BreadPepperidge Farm 100% Whole Wheat Mini BagelsPepperidge Farm 15 Grain Hearty Texture Whole Grain BreadPepperidge Farm Farmhouse Soft 100% Whole Wheat BreadPepperidge Farm Golden Harvest Grains Hearty Texture Whole Grain BreadPepperidge Farm Light Style 7 Grain BreadPepperidge Farm Light Style Soft Wheat BreadPepperidge Farm Oatmeal Hearty Texture Whole Grain BreadPepperidge Farm Soft Honey Oat Smooth Texture Whole Grain BreadPepperidge Farm Soft Honey Whole Wheat Smooth Texture Whole Grain BreadPepperidge Farm Very Thin Soft 100% Whole Wheat BreadPepperidge Farm Whole Grain Multi-Grain BagelsPepperidge Farm Whole Grain Swirl Bread - CinnamonPepperidge Farm Whole Grain Swirl Bread - Cinnamon with RaisinsPerdue Farms, Inc.Perdue Individually Frozen All Natural 99% Fat Free Chicken TenderloinsPerdue Tender & Tasty 99% Fat Free Individually Frozen Boneless Skinless Chicken BreastsPerdue Tender & Tasty 99% Fat Free Individually Wrapped Boneless Skinless Chicken BreastsPerdue/Kirkland Signature Individually Frozen All Natural 99% Fat Free Boneless Skinless Chicken BreastsPilgrim's Pride CorporationEat Well Stay Healthy Chicken Breast SaladEat Well Stay Healthy Fresh Boneles All posts by william-davis Toggle navigation Home Blog Home Archive Join Now Log in Heart Scan Blog Redux: Cheers to flavonoids 13. November 2009 William Davis (32) Because in Track Your Plaque we've been thinking a lot about anthocyanins, here's a rerun of a previous Heart Scan Blog post about red wine. (Anthocyanins are among the interesting flavonoids in red wine, along with resveratrol and quercetin.) The case in favor of healthful flavonoids seems to grow bit by bit. Flavonoids such as procyanadins in wine and chocolate, catechins in tea, and those in walnuts, pomegranates, and pycnogenol (pine bark extract) are suspected to block oxidation of LDL (preventing its entry into plaque), normalize abnormal endothelial constriction, and yield platelet-blocking effects (preventing blood clots). Dr. Roger Corder is a prolific author of many scientific papers detailing his research into the flavonoids of foods, but wine in particular. He summarizes his findings in a recent book, The Red Wine Diet. Contrary to the obvious vying-for-prime-time title, Dr. Corder's compilation is probably the best mainstream discussion of flavonoids in foods and wines that I've come across. Although it would have been more entertaining if peppered with more wit and humans interest, given the topic, its straightfoward, semi-academic telling of the story makes his points effectively. Among the important observations Corder makes is that regions of the world with the greatest longevity also correspond to regions with the highest procyanidin flavonoids in their wines. Regarding the variable flavonoid content of wines, he states:Although differences in the amount of procyanidins in red wine clearly occur because of the grape variety and the vineyard environment, the winemaker holds the key to what ends up in the bottle. The most important aspect of the winemaking process for ensuring high procyanidins in red wines is the contact time between the liquid and the grape seeds during fermentation when the alcohol concentration reaches about 6 percent. Depending on the fermentation temperature, it may be two to three days or more before this extraction process starts. Grape skins float and seeds sink, so the number of times they are pushed down and stirred into the fermenting wine also increases extraction of procyanidins. Even so, extraction is a slow process and, after fermentation is complete, many red wines are left to macerate with their seeds and skins for days or even weeks in order to extract all the color, flavor, and tannins. Wines that have a contact time of less than seven days will have a relatively low level of procyanidins. Wines with a contact time of ten to fourteen days have decent levels, and those with contact times of three weeks or more have the highest. He points out that deeply-colored reds are more likely to be richer in procyanidins; mass-produced wines that are usually "house-grade" served at bars and restaurants tend to be low. Some are close to zero. Wines rich in procyanidins provide several-fold more, such that a single glass can provide the same purported health benefit as several glasses of a procyanidin-poor wine. So how do various wines stack up in procyanidin content? Here's an abbreviated list from his book:Australian--tend to be low, except for Australian Cabernet Sauvignon which is moderate. Chile--only Cabernet Sauvignon stands out, then only moderate in content.France--Where to start? The French, of course, are the perennial masters of wine, and prolonged contact with skins and seeds is usually taken for granted in many varieties of wine. Each wine region (French wines are generally designated by region, not by variety of grape) can also vary widely in flavonoid content. Nonetheless, Bordeaux rate moderately; Burgundy low to moderate (except the village of Pommard); Languedoc-Roussillon moderate to high (and many great bargains in my experience, since these producers live in the shadow of its northern Bordeaux neighbors); Rhone (Cote du Rhone) moderate to high, though beware of their powerful "barnyard" character upon opening; decanting is wise. Italy--Much red Italian wine is made from the Sangiovese grape and called variously Chianti, Valpolicella, and "super-Tuscan" when blended with other varietals. Corder rates the southern Italian wines from Sicily, Sardinia, and the mainland as high in procyanidins; most northern varieties are moderate. Spain--Moderate in general. United States--Though his comments are disappointingly scanty on the U.S., he points out that Cabernet Sauvignon is the standout for procyanidin content. He mentions only the Napa/Sonoma regions, unfortunately. (I'd like to know how the San Diego-Temecula and Virginian wines fare, for instance.)The winner in procyanidin content is a variety grown in the Gers region of southwest France, a region with superior longevity of its residents. The wines here are made with the tannat grape within the Madiran appellation; wines labeled "Madiran" must contain 40% or more tannat to be so labeled (such is a quirk of French wine regulation). Among the producers Dr. Corder lists are Chateau de Sabazan, Chateau Saint-Go, Chateau du Bascou, Domaine Labranche Laffont, and Chateau d'Aydie. (A more complete list can be found in his book.)How does this all figure into the Track Your Plaque program? Can you succeed without red wine? Of course you can. I doubt you could do it, however, without some attention to flavonoid-rich food sources, whether they come from spinach, tea, chocolate, beets, pomegranates, or red wine. Though my wife and I love wine, I confess that I've never personally drank or even seen a French Madiran wine. Any wine afficionados with some advice? Can wheat elimination cure ulcerative colitis? 13. November 2009 William Davis (0) Tammy is a 36-year old mother of three young children. Since age 20, she has suffered with the debilitating symptoms of ulcerative colitis: constant, gnawing abdominal pain; frequent diarrhea, often bloody. Tammy has had to take several medications, some with significant side-effects, all of which provided only partial relief from the pain and diarrhea. Her gastroenterologist and surgeon were planning a colectomy (removal of the colon) with creation of an ileostomy (rerouting of the small intestine to the abdominal surface, which would require Tammy to wear an ileostomy bag under her clothes for the rest of her life).Although Tammy had previously tested negative for celiac disease (an allergic sensitivity to the gluten in wheat products), I urged her to attempt a trial of a wheat-free diet. Having witnessed many people experience relief from irritable bowel syndrome, acid reflux, and other common gastrointestinal complaints, all while trying to reduce blood sugar and small LDL, I'd hoped that Tammy would obtain at least some small improvement in her terrible symptoms. I therefore urged Tammy to try it. After all, what was there to lose? Tammy grudgingly agreed. She returned 6 months later. Her report: She had lost 38 lbs, virtually all of it within the first 6-8 weeks. Her diarrhea and cramping were not better, but gone. She was down to a single medicine from her former list of drugs. I am unsure what proportion of people with ulcerative colitis or other inflammatory bowel diseases like Crohn's will experience a result like Tammy's. Perhaps it's only a minority. But I take this another piece of evidence that this enormously destructive thing called wheat has no place in the human diet. We have no facts or figures on the prevalence of various forms of wheat intolerance in the U.S. When I contacted the Celiac Disease Foundation, they had no figures on the number of fatalities per year in the U.S. from celiac disease. But if there are 2-3 million Americans with celiac disease, there are probably 100 times that many people with various forms of wheat intolerance. Postprandial pile-up with fructose 12. November 2009 William Davis (20) Heart disease is likely caused in the after-eating, postprandial period. That's why the practice of grazing, eating many small meals throughout the day, can potentially increase heart disease risk. Eating often can lead to the phenomenon I call triglyceride and chylomicron "stacking," or the piling up of postprandial breakdown products in the blood stream.Different fatty acid fractions generate different postprandial patterns. But so do different sugars. Fructose, in particular, is an especially potent agent that magnifies the postprandial patterns. (See Goodbye, fructose.)Take a look at the graphs from the exhaustive University of California study by Stanhope et al, 2009:From Stanhope KL et al, J Clin Invest 2009. Click on image to make larger.The left graphs show the triglyceride effects of adding glucose-sweetened drinks (not sucrose) to the study participants' diets. The right graphs show the triglyceride effects of adding fructose-sweetened drinks. Note that fructose causes enormous "stacking" of triglycerides, meaning that postprandial chylomicrons and VLDL particles are accumulating. (This study also showed a 4-fold greater increase in abdominal fat and 45% increase in small LDL particles with fructose.)It means that low-fat salad dressings, sodas, ketchup, spaghetti sauce, and all the other foods made with high-fructose corn syrup not only make you fat, but also magnifies the severity of postprandial lipoprotein stacking, a phenomenon that leads to more atherosclerotic plaque. Track Your Plaque: Safer at any score 11. November 2009 William Davis (0) Imagine two people.Tom is a 50-year old man. Tom's initial heart scan score was 500--a concerning score that carries a 5% risk for heart attack per year.Harry is also 50 years old. His heart scan score is 100--also a concerning score, but not to the same degree as Tom's much higher score. Tom follows the Track Your Plaque program. He achieves the 60:60:60 lipid targets; chooses healthy foods, including elimination of wheat; takes fish oil at a therapeutic dose; increase his blood vitamin D level to 60-70 ng/ml, etc. One year later, Tom's heart scan score is 400, representing a 20% reduction from his starting score.Harry, on the other hand, doesn't understand the implications of his score. Neither does his doctor. He's casually provided a prescription for a cholesterol drug by his doctor, a brief admonition to follow a low-fat diet, and little else. One year later, Harry's heart scan score is 200, a doubling (100% increase) of the original score. At this point, we're left with Tom having a score of 400, Harry with a score of 200. That is, Tom has twice Harry's score, 200 points higher. Who's better off?Tom with the score of 400 is better off. Even though he has a significantly higher score, Tom's plaque is regressing. Tom's plaque is therefore quiescent with active components being extracted, inflammation subsiding, the artery in a more relaxed state, etc. Harry's plaque, in contrast, is active and growing: inflammatory cells are abundant and producing enzymes that degrade supportive tissue, constrictive factors are released that cause the artery to pinch partially closed, fatty materials accumulate and trigger a cascade of abnormal responses.So it's not just the score--the quantity of atherosclerotic plaque present--but the state of activity of the plaque: Is it growing, is it being reduced? Is there escalating or subsiding inflammation? Is plaque filled with degradative enzymes or quiescent? Following the Track Your Plaque program therefore leads us to the notion that it's not the score that's most important; the most important thing is what you're doing about it. We sometimes say that Track Your Plaque makes you safer at any score. Triglyceride and chylomicron "stacking" 10. November 2009 William Davis (24) Continuing the comments started in Grazing is for cattle, here's an interesting study from the Oxford Center for Diabetes, Endocrinology and Metabolism.Volunteers were fed a test meal breakfast of Rice Krispies, a banana, and a chocolate milkshake (76.4 grams carbohydrates, 51.9 grams fat, 12.2 grams protein). Lunch was served 5 hours later and consisted of a cheese sandwich and a second chocolate milkshake 43.4 grams carbohydrates, 49.6 grams fat, 24.0 grams protein). Frequent blood samples were then assessed over the day. (Don't try this at home: These are obviously very dangerous foods!)Here's the pattern of triglycerides that was observed (1st dotted vertical line = breakfast, 2nd dotted vertical line = lunch):Note that triglycerides only begin to decline 3-4 hours after breakfast, only to peak higher after lunch.Here's the pattern observed for chylomicrons, the "granddaddy" of lipoproteins that derives from intestinal absorption of fatty acids:Both graphs from Heath RB et al Am J Phyiol Endocrinol Metab 2006.With chylomicrons, note a similar pattern to triglycerides: Chylomicrons begin to decline at 3-4 hours, only to peak higher after lunch. This is the first study to examine the effect of sequential meals on such postprandial (after-eating) patterns. But it makes the graphic point that, if insufficient time is permitted between meals, both triglycerides and chylomicrons will "stack" themselves higher and higher. (Chylomicrons are subjected to processing by the enzyme, lipoprotein lipase, to form highly atherogenic, or plaque-causing, chylomicron remnants.)While not examined in this study, my bet is that "grazing," i.e., eating small meals or snacks frequently, is an extreme instance of triglyceride, chylomicron, and chylomicron remnant stacking. That can only lead to one thing: accelerated heart and vascular plaque. What is a healthy vitamin D blood level? 9. November 2009 William Davis (32) When measuring blood levels of vitamin D (as 25-hydroxy vitamin D), what constitutes a desirable level? There's no study that directly examines this question, no study that enrolled thousands of people and assigned a placebo group and groups receiving escalating doses of vitamin D and/or achieved higher levels of vitamin D, then observed for development of cancer, diabetes, depression, heart disease, multiple sclerosis, osteoporosis, osteoarthritis, etc. Such a study would requires many thousands of participants (particularly to observe cancer and multiple sclerosis incidence), many years of observation, and many tens of millions of dollars. Nope, only a drug company could afford such costs. So we have to piece together various observations and extrapolate what we believe to be the ideal level of vitamin D. Epidemiologic observations in several cancers (breast, colon, prostate, and bladder) suggest that a 25-hydroxy vitamin D level of 30 ng/ml or higher is desirable (with less cancer incidence above this level). Other data suggest a level of 52 ng/ml or greater is desirable. Unfortunately, much cancer research looked at intake of vitamin D from food and supplement sources, rather than actual blood levels. We also have to factor in the great individual variation in vitamin D metabolism, with a single dose yielding variable blood levels (as much as a 10-fold difference). There's also the variation introduced by vitamin D-receptor variation (genetic polymorphisms). A new study using vitamin D administration helps chart the desirable levels of vitamin D. Vitamin D supplementation reduces insulin resistance in South Asian women living in New Zealand who are insulin resistant and vitamin D deficient - a randomised, placebo-controlled trial.In this New Zealand study, 42 women (23 to 68 years old) were given 4000 units vitamin D, 39 women given placebo. Median 25-hydroxy vitamin D levels increased from 21 nmol/L (8.4 ng/ml) to 75 nmol/L (30 ng/ml). Both HOMA (a measure of insulin sensitivity) and fasting insulin levels improved, with greatest improvement seen at 25-hydroxy vitamin D levels of 80-119 nmol/L (32-47.6 ng/ml) or greater. We also know that a vacation on a Caribbean beach in a bathing suit will increase vitamin D blood levels to the 80-110 ng/ml range without ill-effect (at least in young people who maintain the capacity to activate vitamin D in the skin, a phenomenon that declines as we age). So do we really know the truly ideal level of vitamin D to achieve? I believe that, given the above observations, it is reasonable to extrapolate that the ideal vitamin D blood level likely lies somewhere above 50 ng/ml. We also know that vitamin D toxicity (i.e., hypercalcemia) is virtually unheard of until vitamin D blood levels approach 150 ng/ml, and even then is inconsistent. The health benefits of vitamin D supplementation are so tremendous, that I am not willing to wait for the prospective data to explore this question fully. For now, I aim for a blood level of vitamin D of 60-70 ng/ml (150-175 nmol/L). Grazing is for cattle 5. November 2009 William Davis (17) Many dietitians and nutritionists advise many people today to "graze," i.e., to eat small snacks every couple of hours. They argue that it blocks the drop in insulin and blood sugar that can trigger greater appetite and claim it can facilitate weight loss. This is an absurd notion. Humans are not meant to graze. Humans are meant to find a wild boar or other animal, kill it, gorge on the meat, organs, and fat, then revert to berries, roots, leaves, and other foraged foods until the next kill. A human living in the wild does not have a cupboard or refrigerator full of ready-to-eat snacks to graze on. The several hours after a meal is the most dangerous for creating coronary atherosclerotic plaque, i.e., the post-prandial period. In other words, eat dinner and, for the next 6-12 hours, your intestinal tract degrades the food; food byproducts are absorbed into the blood or lymph system. The blood is literally flooded with the byproducts of your meal. Postprandial abnormalities are emerging to be a potent, and much underappreciated, means of causing heart disease and atherosclerosis in other vascular territories (especially carotid arteries and thoracic aorta). Not eating--i.e., the fasting state--for extended periods is good for you. Encouraging people to graze amplifies atherosclerotic risk, since it creates an abnormal prolonged postprandial state. The disastrous results of a low-fat diet 4. November 2009 William Davis (16) Rob was never that committed to following the program in the first place. I met Rob because of a modest heart scan score and consultation for a cholesterol abnormality. Rob had been cycled through all the statin agents by his primary care physician, all of which resulted in terrible muscle aches that he found intolerable. I started out, as usual, characterizing his cholesterol abnormality with lipoprotein testing (NMR):LDL particle number 1489 nmol/L LDL cholesterol (Friedewald calculation) 143 mg/dlSmall LDL 52% of total LDLHDL 50 mg/dlTriglycerides 82 mg/dl(LDL particle number is the emerging gold standard for LDL quantification, superior to calculated or Friedewald LDL cholesterol for prediction of cardiovascular events.)Rob is a busy guy. After only a couple of brief visits, life and work got in the way and Rob let his attentions drift away from heart health. Since the information I provided made little impact on his thinking, he reverted to the low-fat diet his primary care doctor had originally prescribed and that he read about in magazines and food packages. He also ran out of the basic supplements I had advised, including fish oil and vitamin D, and just never restarted them. A couple of years passed and Rob decided that just poking around on his own might not cut it. So he came back to the office. We repeated his NMR lipoprotein analysis: LDL particle number 2699 nmol/L LDL cholesterol (Friedewald calculation) 229 mg/dlSmall LDL 81% of total LDLHDL 53 mg/dlTriglycerides 78 mg/dlTwo years of a low-fat diet had caused Rob's LDL particle number to skyrocket by 81%, nearly all due to an explosion of small LDL. Recall that small LDL is more susceptible to oxidation, more inflammation-provoking, more adhesive--the form of LDL particles most likely to cause heart disease. Also, note that, despite the enormous increase in small LDL, HDL and triglycerides remained favorable. This counters the popular rule-of-thumb offered by some that small LDL is not present when HDL is "normal." Low-fat diets as commonly practiced are enormously destructive. In Rob's case, a low-fat diet caused both calculated Friedewald LDL as well as LDL particle number to increase dramatically. In many other people, low-fat diets increase calculated Friedewald LDL modestly or not at all, but cause the more accurate LDL particle number to increase significantly, all due to small LDL. I'm happy to say that, once Rob witnessed how far wrong he could go on the wrong program, he's back on Track. (Sorry, pun intended.) He has resumed his supplements and eliminated the food triggers of small LDL--wheat, cornstarch, and sugars. Dr. David Grimes reminds us of vitamin D 3. November 2009 William Davis (13) In response to the Heart Scan Blog post, Fish oil makes you happy: Psychological distress and omega-3 index, Dr. David Grimes offered the following argument. Dr. Grimes is a physician in northwest England at the Blackburn Royal Infirmary, Lancashire. He is author of the wonderfully cheeky 2006 Lancet editorial, Are statins analogues of vitamin D?, questioning whether the benefits of statin drugs simply work by way of increased vitamin D blood levels. There is a fashionable interest in Omega-3 fatty acids, and these become equated with fish oil.But fish oil is much more. Plankton synthesise the related squalene (shark oil) which, in turn, is converted into 7-dehydrocholesterol (7-DHC). The sun now comes into play and it converts 7-DHC into vitamin D (a physico-chemical process).Small fish eat plankton, large fish eat small fish, and we eat large fish. So vitamin D passes through the food chain. This has been a vital source of vitamin D for the the Inuits and also for the Scots and other dwellers of northwest Europe. (Edinburgh is on the same latitude as Hudson Bay and Alaska, further north than anywhere in China). In these locations there is not adequate sunlight energy to guarantee synthesis of adequate amounts of vitamin D, again by the action of sunlight on 7-DHC in the skin.When the Scots moved from coastal fishing villages to industrial cities such as Glasgow, they became seriously deficient in vitamin D, and so the emergence of rickets. This was followed by a variety of other diseases resulting from vitamin D deficiency: tuberculosis, dental decay, coronary heart disease, and even multiple sclerosis and depression (the Glasgow syndrome).And so it was with the Inuits. When their diet changed from fish for breakfast, fish for lunch, fish for dinner, they became deficient of vitamin D and they developed diseases characteristic of industrial cities, where there is indoor work for long hours, indoor activities, and atmospheric pollution.It is the vitamin D component of fish and fish oils that is important.I recently saw an elderly lady from Bangladesh living in northwest England. I would have expected her to have a very low blood level of vitamin D, as her exposure to the sun was minimal. However the blood level was 47ng/ml, not 4 as expected. She eats oily fish from Bangladesh every day, showing its value as a source of vitamin D with subsequent good health. I expect her blood levels of omega-3 fatty acids would also be high.But it is unfashionable vitamin D that is important, not fashionable omega-3.David Grimeswww.vitamindandcholesterol.comExcellent point. The health effects of omega-3 and vitamin D are intimately intertwined when examining populations that consume fish.In this study of Inuits, it is indeed impossible to dissect out how much psychological distress was due to reduced vitamin D, how much due to reduced omega-3s. My bet is that it's both. Thankfully, we also have data examining the use of pure omega-3 fatty acids in capsule (not intact fish) form, including studies like GISSI Prevenzione. Nonetheless, Dr. Grimes reminds us that both vitamin D and omega-3 fatty acids from fish oil play crucial roles in mental health and other aspects of health, and that it's the combination that may account for the extravagant health effects previously ascribed only to omega-3s. Why does fish oil reduce triglycerides? 2. November 2009 William Davis (9) Beyond its ability to slash risk for cardiovascular events, omega-3 fatty acids from fish oil also reduce triglycerides. There's no remaining question that omega-3s do this quite effectively. After all, the FDA approved prescription fish oil, Lovaza, to treat a condition called familial hypertriglyceridemia, an inherited condition in which very high triglycerides in the 100s or 1000s of milligrams typically develop. The omega-3 fraction of fatty acids are unique for their triglyceride-reducing property. No other fraction of fatty acids, such as omega-6 or saturated, can match the triglyceride-reducing effect of omega-3s. But why does fish oil reduce triglycerides? First of all, what are triglycerides? As their name suggests, triglycerides consist of three ("tri-") fatty acids lined up along a glycerol (sugar) "backbone." Triglycerides are the form in which most fatty acids occur in the bloodstream, liver, and other organs. (Fatty acids, like omega-3, omega-6, mono- or polyunsaturated, or saturated, rarely occur as free fatty acids unbound to glycerol.) In various lipoproteins in the blood, like LDL, VLDL, and HDL, fatty acids occur as triglycerides. Of all lipoproteins, chylomicrons (the large particle formed through intestinal absorption of fatty acids and transported to the liver via the lymph system) and VLDL (very low-density lipoprotein, very low-density because they are mostly fat and little protein) particles are richest in triglycerides. Thus, we would expect that omega-3s exert their triglyceride-reducing effect via reductions in either chylomicrons or VLDL. Indeed, that seems to be the case. The emerging evidence suggests that omega-3 fatty acids from fish oil reduce triglycerides through:--Reduced VLDL production by the liver (Harris 1989)--Accelerating chylomicron and VLDL elimination from the blood --Activation of peroxisome proliferator-activated receptor gamma (PPAR-gamma)--Omega-3s ramp up the cellular equipment used to convert fatty acids to energy (oxidation) (Gani 2008)Combine omega-3 fatty acids from fish oil with wheat elimination and you have an extremely potent means of reducing triglycerides. Read a previous Heart Scan Blog post here to read how a patient reduced triglycerides 93.5% from 3100 mg/dl to 210 mg/dl in just a few weeks using fish oil and wheat elimination. << Older posts Newer posts >> Newer posts12...313233343536373839...121122Older posts
Heart Scan Blog Redux: Cheers to flavonoids 13. November 2009 William Davis (32) Because in Track Your Plaque we've been thinking a lot about anthocyanins, here's a rerun of a previous Heart Scan Blog post about red wine. (Anthocyanins are among the interesting flavonoids in red wine, along with resveratrol and quercetin.) The case in favor of healthful flavonoids seems to grow bit by bit. Flavonoids such as procyanadins in wine and chocolate, catechins in tea, and those in walnuts, pomegranates, and pycnogenol (pine bark extract) are suspected to block oxidation of LDL (preventing its entry into plaque), normalize abnormal endothelial constriction, and yield platelet-blocking effects (preventing blood clots). Dr. Roger Corder is a prolific author of many scientific papers detailing his research into the flavonoids of foods, but wine in particular. He summarizes his findings in a recent book, The Red Wine Diet. Contrary to the obvious vying-for-prime-time title, Dr. Corder's compilation is probably the best mainstream discussion of flavonoids in foods and wines that I've come across. Although it would have been more entertaining if peppered with more wit and humans interest, given the topic, its straightfoward, semi-academic telling of the story makes his points effectively. Among the important observations Corder makes is that regions of the world with the greatest longevity also correspond to regions with the highest procyanidin flavonoids in their wines. Regarding the variable flavonoid content of wines, he states:Although differences in the amount of procyanidins in red wine clearly occur because of the grape variety and the vineyard environment, the winemaker holds the key to what ends up in the bottle. The most important aspect of the winemaking process for ensuring high procyanidins in red wines is the contact time between the liquid and the grape seeds during fermentation when the alcohol concentration reaches about 6 percent. Depending on the fermentation temperature, it may be two to three days or more before this extraction process starts. Grape skins float and seeds sink, so the number of times they are pushed down and stirred into the fermenting wine also increases extraction of procyanidins. Even so, extraction is a slow process and, after fermentation is complete, many red wines are left to macerate with their seeds and skins for days or even weeks in order to extract all the color, flavor, and tannins. Wines that have a contact time of less than seven days will have a relatively low level of procyanidins. Wines with a contact time of ten to fourteen days have decent levels, and those with contact times of three weeks or more have the highest. He points out that deeply-colored reds are more likely to be richer in procyanidins; mass-produced wines that are usually "house-grade" served at bars and restaurants tend to be low. Some are close to zero. Wines rich in procyanidins provide several-fold more, such that a single glass can provide the same purported health benefit as several glasses of a procyanidin-poor wine. So how do various wines stack up in procyanidin content? Here's an abbreviated list from his book:Australian--tend to be low, except for Australian Cabernet Sauvignon which is moderate. Chile--only Cabernet Sauvignon stands out, then only moderate in content.France--Where to start? The French, of course, are the perennial masters of wine, and prolonged contact with skins and seeds is usually taken for granted in many varieties of wine. Each wine region (French wines are generally designated by region, not by variety of grape) can also vary widely in flavonoid content. Nonetheless, Bordeaux rate moderately; Burgundy low to moderate (except the village of Pommard); Languedoc-Roussillon moderate to high (and many great bargains in my experience, since these producers live in the shadow of its northern Bordeaux neighbors); Rhone (Cote du Rhone) moderate to high, though beware of their powerful "barnyard" character upon opening; decanting is wise. Italy--Much red Italian wine is made from the Sangiovese grape and called variously Chianti, Valpolicella, and "super-Tuscan" when blended with other varietals. Corder rates the southern Italian wines from Sicily, Sardinia, and the mainland as high in procyanidins; most northern varieties are moderate. Spain--Moderate in general. United States--Though his comments are disappointingly scanty on the U.S., he points out that Cabernet Sauvignon is the standout for procyanidin content. He mentions only the Napa/Sonoma regions, unfortunately. (I'd like to know how the San Diego-Temecula and Virginian wines fare, for instance.)The winner in procyanidin content is a variety grown in the Gers region of southwest France, a region with superior longevity of its residents. The wines here are made with the tannat grape within the Madiran appellation; wines labeled "Madiran" must contain 40% or more tannat to be so labeled (such is a quirk of French wine regulation). Among the producers Dr. Corder lists are Chateau de Sabazan, Chateau Saint-Go, Chateau du Bascou, Domaine Labranche Laffont, and Chateau d'Aydie. (A more complete list can be found in his book.)How does this all figure into the Track Your Plaque program? Can you succeed without red wine? Of course you can. I doubt you could do it, however, without some attention to flavonoid-rich food sources, whether they come from spinach, tea, chocolate, beets, pomegranates, or red wine. Though my wife and I love wine, I confess that I've never personally drank or even seen a French Madiran wine. Any wine afficionados with some advice?
Can wheat elimination cure ulcerative colitis? 13. November 2009 William Davis (0) Tammy is a 36-year old mother of three young children. Since age 20, she has suffered with the debilitating symptoms of ulcerative colitis: constant, gnawing abdominal pain; frequent diarrhea, often bloody. Tammy has had to take several medications, some with significant side-effects, all of which provided only partial relief from the pain and diarrhea. Her gastroenterologist and surgeon were planning a colectomy (removal of the colon) with creation of an ileostomy (rerouting of the small intestine to the abdominal surface, which would require Tammy to wear an ileostomy bag under her clothes for the rest of her life).Although Tammy had previously tested negative for celiac disease (an allergic sensitivity to the gluten in wheat products), I urged her to attempt a trial of a wheat-free diet. Having witnessed many people experience relief from irritable bowel syndrome, acid reflux, and other common gastrointestinal complaints, all while trying to reduce blood sugar and small LDL, I'd hoped that Tammy would obtain at least some small improvement in her terrible symptoms. I therefore urged Tammy to try it. After all, what was there to lose? Tammy grudgingly agreed. She returned 6 months later. Her report: She had lost 38 lbs, virtually all of it within the first 6-8 weeks. Her diarrhea and cramping were not better, but gone. She was down to a single medicine from her former list of drugs. I am unsure what proportion of people with ulcerative colitis or other inflammatory bowel diseases like Crohn's will experience a result like Tammy's. Perhaps it's only a minority. But I take this another piece of evidence that this enormously destructive thing called wheat has no place in the human diet. We have no facts or figures on the prevalence of various forms of wheat intolerance in the U.S. When I contacted the Celiac Disease Foundation, they had no figures on the number of fatalities per year in the U.S. from celiac disease. But if there are 2-3 million Americans with celiac disease, there are probably 100 times that many people with various forms of wheat intolerance.
Postprandial pile-up with fructose 12. November 2009 William Davis (20) Heart disease is likely caused in the after-eating, postprandial period. That's why the practice of grazing, eating many small meals throughout the day, can potentially increase heart disease risk. Eating often can lead to the phenomenon I call triglyceride and chylomicron "stacking," or the piling up of postprandial breakdown products in the blood stream.Different fatty acid fractions generate different postprandial patterns. But so do different sugars. Fructose, in particular, is an especially potent agent that magnifies the postprandial patterns. (See Goodbye, fructose.)Take a look at the graphs from the exhaustive University of California study by Stanhope et al, 2009:From Stanhope KL et al, J Clin Invest 2009. Click on image to make larger.The left graphs show the triglyceride effects of adding glucose-sweetened drinks (not sucrose) to the study participants' diets. The right graphs show the triglyceride effects of adding fructose-sweetened drinks. Note that fructose causes enormous "stacking" of triglycerides, meaning that postprandial chylomicrons and VLDL particles are accumulating. (This study also showed a 4-fold greater increase in abdominal fat and 45% increase in small LDL particles with fructose.)It means that low-fat salad dressings, sodas, ketchup, spaghetti sauce, and all the other foods made with high-fructose corn syrup not only make you fat, but also magnifies the severity of postprandial lipoprotein stacking, a phenomenon that leads to more atherosclerotic plaque.
Track Your Plaque: Safer at any score 11. November 2009 William Davis (0) Imagine two people.Tom is a 50-year old man. Tom's initial heart scan score was 500--a concerning score that carries a 5% risk for heart attack per year.Harry is also 50 years old. His heart scan score is 100--also a concerning score, but not to the same degree as Tom's much higher score. Tom follows the Track Your Plaque program. He achieves the 60:60:60 lipid targets; chooses healthy foods, including elimination of wheat; takes fish oil at a therapeutic dose; increase his blood vitamin D level to 60-70 ng/ml, etc. One year later, Tom's heart scan score is 400, representing a 20% reduction from his starting score.Harry, on the other hand, doesn't understand the implications of his score. Neither does his doctor. He's casually provided a prescription for a cholesterol drug by his doctor, a brief admonition to follow a low-fat diet, and little else. One year later, Harry's heart scan score is 200, a doubling (100% increase) of the original score. At this point, we're left with Tom having a score of 400, Harry with a score of 200. That is, Tom has twice Harry's score, 200 points higher. Who's better off?Tom with the score of 400 is better off. Even though he has a significantly higher score, Tom's plaque is regressing. Tom's plaque is therefore quiescent with active components being extracted, inflammation subsiding, the artery in a more relaxed state, etc. Harry's plaque, in contrast, is active and growing: inflammatory cells are abundant and producing enzymes that degrade supportive tissue, constrictive factors are released that cause the artery to pinch partially closed, fatty materials accumulate and trigger a cascade of abnormal responses.So it's not just the score--the quantity of atherosclerotic plaque present--but the state of activity of the plaque: Is it growing, is it being reduced? Is there escalating or subsiding inflammation? Is plaque filled with degradative enzymes or quiescent? Following the Track Your Plaque program therefore leads us to the notion that it's not the score that's most important; the most important thing is what you're doing about it. We sometimes say that Track Your Plaque makes you safer at any score.
Triglyceride and chylomicron "stacking" 10. November 2009 William Davis (24) Continuing the comments started in Grazing is for cattle, here's an interesting study from the Oxford Center for Diabetes, Endocrinology and Metabolism.Volunteers were fed a test meal breakfast of Rice Krispies, a banana, and a chocolate milkshake (76.4 grams carbohydrates, 51.9 grams fat, 12.2 grams protein). Lunch was served 5 hours later and consisted of a cheese sandwich and a second chocolate milkshake 43.4 grams carbohydrates, 49.6 grams fat, 24.0 grams protein). Frequent blood samples were then assessed over the day. (Don't try this at home: These are obviously very dangerous foods!)Here's the pattern of triglycerides that was observed (1st dotted vertical line = breakfast, 2nd dotted vertical line = lunch):Note that triglycerides only begin to decline 3-4 hours after breakfast, only to peak higher after lunch.Here's the pattern observed for chylomicrons, the "granddaddy" of lipoproteins that derives from intestinal absorption of fatty acids:Both graphs from Heath RB et al Am J Phyiol Endocrinol Metab 2006.With chylomicrons, note a similar pattern to triglycerides: Chylomicrons begin to decline at 3-4 hours, only to peak higher after lunch. This is the first study to examine the effect of sequential meals on such postprandial (after-eating) patterns. But it makes the graphic point that, if insufficient time is permitted between meals, both triglycerides and chylomicrons will "stack" themselves higher and higher. (Chylomicrons are subjected to processing by the enzyme, lipoprotein lipase, to form highly atherogenic, or plaque-causing, chylomicron remnants.)While not examined in this study, my bet is that "grazing," i.e., eating small meals or snacks frequently, is an extreme instance of triglyceride, chylomicron, and chylomicron remnant stacking. That can only lead to one thing: accelerated heart and vascular plaque.
What is a healthy vitamin D blood level? 9. November 2009 William Davis (32) When measuring blood levels of vitamin D (as 25-hydroxy vitamin D), what constitutes a desirable level? There's no study that directly examines this question, no study that enrolled thousands of people and assigned a placebo group and groups receiving escalating doses of vitamin D and/or achieved higher levels of vitamin D, then observed for development of cancer, diabetes, depression, heart disease, multiple sclerosis, osteoporosis, osteoarthritis, etc. Such a study would requires many thousands of participants (particularly to observe cancer and multiple sclerosis incidence), many years of observation, and many tens of millions of dollars. Nope, only a drug company could afford such costs. So we have to piece together various observations and extrapolate what we believe to be the ideal level of vitamin D. Epidemiologic observations in several cancers (breast, colon, prostate, and bladder) suggest that a 25-hydroxy vitamin D level of 30 ng/ml or higher is desirable (with less cancer incidence above this level). Other data suggest a level of 52 ng/ml or greater is desirable. Unfortunately, much cancer research looked at intake of vitamin D from food and supplement sources, rather than actual blood levels. We also have to factor in the great individual variation in vitamin D metabolism, with a single dose yielding variable blood levels (as much as a 10-fold difference). There's also the variation introduced by vitamin D-receptor variation (genetic polymorphisms). A new study using vitamin D administration helps chart the desirable levels of vitamin D. Vitamin D supplementation reduces insulin resistance in South Asian women living in New Zealand who are insulin resistant and vitamin D deficient - a randomised, placebo-controlled trial.In this New Zealand study, 42 women (23 to 68 years old) were given 4000 units vitamin D, 39 women given placebo. Median 25-hydroxy vitamin D levels increased from 21 nmol/L (8.4 ng/ml) to 75 nmol/L (30 ng/ml). Both HOMA (a measure of insulin sensitivity) and fasting insulin levels improved, with greatest improvement seen at 25-hydroxy vitamin D levels of 80-119 nmol/L (32-47.6 ng/ml) or greater. We also know that a vacation on a Caribbean beach in a bathing suit will increase vitamin D blood levels to the 80-110 ng/ml range without ill-effect (at least in young people who maintain the capacity to activate vitamin D in the skin, a phenomenon that declines as we age). So do we really know the truly ideal level of vitamin D to achieve? I believe that, given the above observations, it is reasonable to extrapolate that the ideal vitamin D blood level likely lies somewhere above 50 ng/ml. We also know that vitamin D toxicity (i.e., hypercalcemia) is virtually unheard of until vitamin D blood levels approach 150 ng/ml, and even then is inconsistent. The health benefits of vitamin D supplementation are so tremendous, that I am not willing to wait for the prospective data to explore this question fully. For now, I aim for a blood level of vitamin D of 60-70 ng/ml (150-175 nmol/L).
Grazing is for cattle 5. November 2009 William Davis (17) Many dietitians and nutritionists advise many people today to "graze," i.e., to eat small snacks every couple of hours. They argue that it blocks the drop in insulin and blood sugar that can trigger greater appetite and claim it can facilitate weight loss. This is an absurd notion. Humans are not meant to graze. Humans are meant to find a wild boar or other animal, kill it, gorge on the meat, organs, and fat, then revert to berries, roots, leaves, and other foraged foods until the next kill. A human living in the wild does not have a cupboard or refrigerator full of ready-to-eat snacks to graze on. The several hours after a meal is the most dangerous for creating coronary atherosclerotic plaque, i.e., the post-prandial period. In other words, eat dinner and, for the next 6-12 hours, your intestinal tract degrades the food; food byproducts are absorbed into the blood or lymph system. The blood is literally flooded with the byproducts of your meal. Postprandial abnormalities are emerging to be a potent, and much underappreciated, means of causing heart disease and atherosclerosis in other vascular territories (especially carotid arteries and thoracic aorta). Not eating--i.e., the fasting state--for extended periods is good for you. Encouraging people to graze amplifies atherosclerotic risk, since it creates an abnormal prolonged postprandial state.
The disastrous results of a low-fat diet 4. November 2009 William Davis (16) Rob was never that committed to following the program in the first place. I met Rob because of a modest heart scan score and consultation for a cholesterol abnormality. Rob had been cycled through all the statin agents by his primary care physician, all of which resulted in terrible muscle aches that he found intolerable. I started out, as usual, characterizing his cholesterol abnormality with lipoprotein testing (NMR):LDL particle number 1489 nmol/L LDL cholesterol (Friedewald calculation) 143 mg/dlSmall LDL 52% of total LDLHDL 50 mg/dlTriglycerides 82 mg/dl(LDL particle number is the emerging gold standard for LDL quantification, superior to calculated or Friedewald LDL cholesterol for prediction of cardiovascular events.)Rob is a busy guy. After only a couple of brief visits, life and work got in the way and Rob let his attentions drift away from heart health. Since the information I provided made little impact on his thinking, he reverted to the low-fat diet his primary care doctor had originally prescribed and that he read about in magazines and food packages. He also ran out of the basic supplements I had advised, including fish oil and vitamin D, and just never restarted them. A couple of years passed and Rob decided that just poking around on his own might not cut it. So he came back to the office. We repeated his NMR lipoprotein analysis: LDL particle number 2699 nmol/L LDL cholesterol (Friedewald calculation) 229 mg/dlSmall LDL 81% of total LDLHDL 53 mg/dlTriglycerides 78 mg/dlTwo years of a low-fat diet had caused Rob's LDL particle number to skyrocket by 81%, nearly all due to an explosion of small LDL. Recall that small LDL is more susceptible to oxidation, more inflammation-provoking, more adhesive--the form of LDL particles most likely to cause heart disease. Also, note that, despite the enormous increase in small LDL, HDL and triglycerides remained favorable. This counters the popular rule-of-thumb offered by some that small LDL is not present when HDL is "normal." Low-fat diets as commonly practiced are enormously destructive. In Rob's case, a low-fat diet caused both calculated Friedewald LDL as well as LDL particle number to increase dramatically. In many other people, low-fat diets increase calculated Friedewald LDL modestly or not at all, but cause the more accurate LDL particle number to increase significantly, all due to small LDL. I'm happy to say that, once Rob witnessed how far wrong he could go on the wrong program, he's back on Track. (Sorry, pun intended.) He has resumed his supplements and eliminated the food triggers of small LDL--wheat, cornstarch, and sugars.
Dr. David Grimes reminds us of vitamin D 3. November 2009 William Davis (13) In response to the Heart Scan Blog post, Fish oil makes you happy: Psychological distress and omega-3 index, Dr. David Grimes offered the following argument. Dr. Grimes is a physician in northwest England at the Blackburn Royal Infirmary, Lancashire. He is author of the wonderfully cheeky 2006 Lancet editorial, Are statins analogues of vitamin D?, questioning whether the benefits of statin drugs simply work by way of increased vitamin D blood levels. There is a fashionable interest in Omega-3 fatty acids, and these become equated with fish oil.But fish oil is much more. Plankton synthesise the related squalene (shark oil) which, in turn, is converted into 7-dehydrocholesterol (7-DHC). The sun now comes into play and it converts 7-DHC into vitamin D (a physico-chemical process).Small fish eat plankton, large fish eat small fish, and we eat large fish. So vitamin D passes through the food chain. This has been a vital source of vitamin D for the the Inuits and also for the Scots and other dwellers of northwest Europe. (Edinburgh is on the same latitude as Hudson Bay and Alaska, further north than anywhere in China). In these locations there is not adequate sunlight energy to guarantee synthesis of adequate amounts of vitamin D, again by the action of sunlight on 7-DHC in the skin.When the Scots moved from coastal fishing villages to industrial cities such as Glasgow, they became seriously deficient in vitamin D, and so the emergence of rickets. This was followed by a variety of other diseases resulting from vitamin D deficiency: tuberculosis, dental decay, coronary heart disease, and even multiple sclerosis and depression (the Glasgow syndrome).And so it was with the Inuits. When their diet changed from fish for breakfast, fish for lunch, fish for dinner, they became deficient of vitamin D and they developed diseases characteristic of industrial cities, where there is indoor work for long hours, indoor activities, and atmospheric pollution.It is the vitamin D component of fish and fish oils that is important.I recently saw an elderly lady from Bangladesh living in northwest England. I would have expected her to have a very low blood level of vitamin D, as her exposure to the sun was minimal. However the blood level was 47ng/ml, not 4 as expected. She eats oily fish from Bangladesh every day, showing its value as a source of vitamin D with subsequent good health. I expect her blood levels of omega-3 fatty acids would also be high.But it is unfashionable vitamin D that is important, not fashionable omega-3.David Grimeswww.vitamindandcholesterol.comExcellent point. The health effects of omega-3 and vitamin D are intimately intertwined when examining populations that consume fish.In this study of Inuits, it is indeed impossible to dissect out how much psychological distress was due to reduced vitamin D, how much due to reduced omega-3s. My bet is that it's both. Thankfully, we also have data examining the use of pure omega-3 fatty acids in capsule (not intact fish) form, including studies like GISSI Prevenzione. Nonetheless, Dr. Grimes reminds us that both vitamin D and omega-3 fatty acids from fish oil play crucial roles in mental health and other aspects of health, and that it's the combination that may account for the extravagant health effects previously ascribed only to omega-3s.
Why does fish oil reduce triglycerides? 2. November 2009 William Davis (9) Beyond its ability to slash risk for cardiovascular events, omega-3 fatty acids from fish oil also reduce triglycerides. There's no remaining question that omega-3s do this quite effectively. After all, the FDA approved prescription fish oil, Lovaza, to treat a condition called familial hypertriglyceridemia, an inherited condition in which very high triglycerides in the 100s or 1000s of milligrams typically develop. The omega-3 fraction of fatty acids are unique for their triglyceride-reducing property. No other fraction of fatty acids, such as omega-6 or saturated, can match the triglyceride-reducing effect of omega-3s. But why does fish oil reduce triglycerides? First of all, what are triglycerides? As their name suggests, triglycerides consist of three ("tri-") fatty acids lined up along a glycerol (sugar) "backbone." Triglycerides are the form in which most fatty acids occur in the bloodstream, liver, and other organs. (Fatty acids, like omega-3, omega-6, mono- or polyunsaturated, or saturated, rarely occur as free fatty acids unbound to glycerol.) In various lipoproteins in the blood, like LDL, VLDL, and HDL, fatty acids occur as triglycerides. Of all lipoproteins, chylomicrons (the large particle formed through intestinal absorption of fatty acids and transported to the liver via the lymph system) and VLDL (very low-density lipoprotein, very low-density because they are mostly fat and little protein) particles are richest in triglycerides. Thus, we would expect that omega-3s exert their triglyceride-reducing effect via reductions in either chylomicrons or VLDL. Indeed, that seems to be the case. The emerging evidence suggests that omega-3 fatty acids from fish oil reduce triglycerides through:--Reduced VLDL production by the liver (Harris 1989)--Accelerating chylomicron and VLDL elimination from the blood --Activation of peroxisome proliferator-activated receptor gamma (PPAR-gamma)--Omega-3s ramp up the cellular equipment used to convert fatty acids to energy (oxidation) (Gani 2008)Combine omega-3 fatty acids from fish oil with wheat elimination and you have an extremely potent means of reducing triglycerides. Read a previous Heart Scan Blog post here to read how a patient reduced triglycerides 93.5% from 3100 mg/dl to 210 mg/dl in just a few weeks using fish oil and wheat elimination.