Heart scan curiosities 1

Heart scans often reveal more than coronary plaque. From time to time, I'll show some curious findings that people have displayed during routine heart scans.

This 65-year old man had a relatively low heart scan score of 73, but showed an impressive quantity of calcification of his pericardium, the usually soft-tissue sack that encases the heart. The calcified pericardium is the white arcs that surround the heart in the center of the image.



Thankfully, because he's without any symptoms of breathlessness, excessive fatigue, or leg swelling, he won't need to have it surgically corrected. When the pericardium becomes rigid and encircles the heart, it can literally squeeze the heart, a condition called "constrictive pericarditis". The surgery is pretty awful.

This man's calcified pericardium likely resulted from one or more viral infections over his lifetime.

Annual physical

A judge who lives in my neighborhood was found dead in his bed this week from a heart attack. He was 49 years old. His teenage kids found him and performed CPR, but he was cold and long-gone by then.

A close friend of the judge told me that he'd passed an annual physical just weeks before.

This sort of tragedy shouldn't happen. It is easily--easily--preventable. Had this man undergone a heart scan, a score of at least 400 if not >1000 would have been uncovered, and appropriate preventive action could have been taken. The conversation could have centered around the strategies to correct the patterns that triggered his plaque and how he could reduce his score.

Of course, hospitals make use of stories like this to fuel fear that brings hordes to their wards for procedures. Would the judge have required a procedure to save his life, had his heart disease been diagnosed at his annual physical? Not necessarily. Hospitals and cardiologists would try to persuade you that procedures have an impact on mortality. This is simply not true. In fact, the mortality benefits of procedures are questionable except in the midst of acute illness (e.g., unstable chest pain symptoms or heart attack).

Don't be falsely reassured by passing a physical. A physical does nothing to screen you for heart disease. An EKG and stress test, if included, is a lame excuse for heart disease screening. Remember that a stress test is a test of coronary blood flow, not for the presence of coronary plaque. The unfortunate judge most likely had a 30% "blockage" that did not block flow, but ruptured and closed an artery off sometime in the night when he died. A stress test even on the day of his death would not have predicted this.

A CT heart scan would have uncovered it easily, unequivocally, safely.

A curious case of regression

Randi came to me at age 43. Before I'd met her, she'd undergone two heart scans about one year apart. The initial score was 57--not terribly high, but very high for a 41-year old, pre-menopausal female. Recall that rarely do women have any heart scan score above zero before age 50. Randi's 2nd scan had yielded a score of 72, a 27% increase.

Randi even had her lipoproteins assessed and she had the dreaded Lp(a). So when I met her, we discussed the possible choices in Lp(a) treatment: niacin and estrogens as primary treatment, along with LDL reduction to rock-bottom numbers, along with adjunctive DHEA, almonds, ground flaxseed, and fish oil. Sandi was okay with the adjunctive treatments and was already slender and active (BMI <25), and did not show Lp(a)'s evil partner, small LDL. But Randi had no interest in estrogens, even bio-identical preparations, because of the usual uncertainties associated with estrogen replacement. She also proved to be one of the people truly intolerant to anything but the most minute dose of niacin, experiencing prolonged flushing and abdominal cramps with any dose >250 mg.

Randi even attempted a trial of the Mathias Rath concoction of high-dose vitamin C, lysine, and proline as treatment for Lp(a), but we saw no effect on Lp(a).

Unfortunately, this left Randi's Lp(a) essentially uncorrected. Another scan one year later: 90, another 25% increase. 18 months after that, another scan: 120, a 30% increase.

Now 47-years old, Randi had resigned herself to not being able to control her plaque. We'd run out of options. At that point, I'd started to have everyone's vitamin D blood level assessed and then replaced with vitamin D. I did this with Randi, too.

A year after her last scan, she underwent another. The score: 92, a 23% reduction--substantial reversal following a course of unrelenting progression.

Randi and I, of course, both rejoiced with this unexpected success. But it raised some interesting questions: How important is Lp(a) when vitamin D is normalized and small LDL is not a part of the picture? How consistent with regression be with this strategy over time? Would normalization of vitamin D have stopped plaque from becoming established in the first place?

I hope these issues will clarify over time. For now, I'm thrilled with Randi's success. She remains on her present, "incomplete", though successful program.

Note: I would not ordinarily advise a young woman to undergo serial heart scanning with this frequency. Randi had unusual access to a scan center through a relationship with the staff. I am nonetheless grateful for the lessons her experience have taught us.

Fortune teller

Whenever your doctor uses your cholesterol values--total, LDL, HDL, triglycerides--to judge your heart disease risk, he/she is trying to act as your fortune teller.

In some states, fortune telling is illegal, a misdemeanor. The New York State lawbooks say:

A person is guilty of fortune telling when, for a fee or compensation which he directly or indirectly solicits or receives, he claims or pretends to tell fortunes, or holds himself out as being able, by claimed or pretended use of occult powers, to answer questions or give advice on personal matters or to exorcise, influence or affect evil spirits or curses; except that this section does not apply to a person who engages in the aforedescribed conduct as part of a show or exhibition solely for the purpose of entertainment or amusement.
(Source : Wikipedia)

Rather than occult powers, your physician claims to use "medical judgement" to tell your fortune. Except for that distinction, it might be construed as a misdemeanor.


Let's take three typical examples:

58-year old Laura has a high LDL of 195 mg/dl. Her HDL is 52 mg/dl, triglycerides 197 mg/dl. Does she have heart disease?

51-year old Jonathan has an LDL of 174 mg/dl, HDL 34 mg/dl, triglycerides 156 mg/dl. Does Jonathan have heart disease?

71-year old Marian has an LDL cholesterol of 135 mg/dl, HDL 84 mg/dl, triglycerides of 67 mg/dl.

None of the three have symptoms. They all feel well. Nobody is taking a statin cholesterol drug or other agent that would modify the numbers. Jonathan is around 30 lbs overweight. Nobody has an impressive family history of heart disease.

Can you tell who has heart disease and who doesn't? If you can, you're smarter than I am, because I certainly can't tell. But your doctor tries to divine your future by looking at these numbers.

Do they know something that we don't know? No. It's a crude odds game, a guessing game. A guessing game that frequently comes up on the losing end.

These are three real people. Laura, despite her high LDL, has no identifiable coronary heart disease. Jonathan has advanced coronary disease. These were his numbers just prior to his stent. Marian has a moderate quantity revealed by a CT heart scan score of 419.

Don't even try predicting your future from your cholesterol numbers--it simply can't be done. Every day, I see patients and physicians beating their heads over this dilemma. Telling your fortune using pretended occult powers is illegal. Telling your fortune using cholesterol numbers should be, too.

If you want to know if you have coronary plaque, that's the role of the CT heart scan. Plain and simple.

Heart scan score drops like a stone

Matt was dumbfounded when he found out about his heart scan score of 317 in the summer of 2005.

Earlier that year he'd unintentionally lost 20 lbs. in the space of two months and was feeling awful. He was diagnosed with diabetes and put on several medications. He told me that the heart scan score was just adding insult to injury.

As you'd expect in someone with diabetes, Matt had a low HDL, increased triglycerides, and small LDL. Blood pressure and inflammation (C-reactive protein) were issues as well.

Matt's primary care physician had put him on a statin cholesterol drug as soon as he heard about Matt's heart scan score, so we kept this going. What Matt's primary care physician didn't know was that his "true" LDL had been much higher than the conventional calculated LDL had suggested, so the statin agent was a reasonable solution. (Matt was also not terribly motivated to make dramatic changes in lifestyle or food choices. The statin drug was a compromise.)

We added fish oil and vitamin D to his regimen. Though recent data have cast doubt on the value of treating homocysteine levels of around 12.5, Matt's much higher value of 28 was treated with vitamins B6, B12, and folic acid, with a resultant homocysteine of 7.6.

17 months into the Track Your Plaque approach, and Matt's repeat heart scan score: 244, a 23% reduction.

How's that for an early Christmas gift?

"You don't have a uterus. You don't need progesterone"

I was talking with a hospital nurse recently who told me about her lack of energy, blue moods, and other assorted complaints. At age 49, she was exasperated. So I suggested that she ask her gynecologist about progesterone cream.

The gynecologist advised her, "You don't have a uterus. You don't need progesterone." He went on to explain that the only reason to take progesterone was to prevent uterine cancer caused by estrogen.

Then what about progesterone's weight loss benefits? It's effects on increased energy, improved mood, deeper sleep? These benefits, of course, have nothing to do with the uterus.

I've witnessed these benefits in women many times, both in the peri-menopausal period (which starts around your late 30's) and menopause.

Why talk about progesterone when our focus is heart disease and reduction of heart scan scores? Because if progesterone in a woman helps her feel better, more upbeat, and accelerates weight loss, she's more likely to succeed in her plaque-control program.

For additional comments on progesterone, read the Track Your Plaque interview with women's hormone expert, Dr. Nisha Jackson, Females, hormones, and weight control:
An interview with Dr. Nisha Jackson
found at http://www.cureality.com/library/fl_04-008njacksonhormones.asp. Dr. Jackson also has a book available called "The Hormone Survival Guide to Perimenopause".







Or, read Dr. John Lee's pioneering books, What Your Doctor May Not Tell You About Menopause: The Breakthrough Book on Natural Hormone Balance and What Your Doctor May Not Tell You About Premenopause: Balance Your Hormones and Your Life from Thirty to Fifty . (An edition that combines the two books is available, also.)

Take a niacin "vacation"

I've been seeing a curious niacin phenomenon that has not, to my knowledge, been reported anywhere in the medical literature.

People with lipoprotein(a), or Lp(a), are best treated with niacin, particularly given the relative lack of other effective therapies. I now have seen approximately 10 people with great initial responses to niacin, only to observe Lp(a) levels slowly drift back up to the starting level over a period of 2-3 years.

In other words, if starting Lp(a) is 200 nmol/l (approximately 80 mg/dl), drops to 70 nmol/l on niacin. Then, over 2-3 years of treatment, it drifts back to 200 nmol/l. Very frustrating.

Somehow, your body's Lp(a) manufacturing mechanism circumvents the niacin, sort of like antibiotic resistance (without the bacteria, of course).

My response to this, though untested, is to have people take an occasional "niacin vacation". I don't mean take a trip to the Bahamas while on niacin. I mean take 2 weeks off from niacin every three months or so. My hope is that the occasional vacation from niacin will allow the body to continue to respond and suppress "resistance". When resuming niacin, you may have to escalate the dose gradually to avoid re-provoking the "flush".

The same "resistance" seems to develop to testosterone in males: an initial drop followed by a gradual increase. Curiously, I've not seen this in females with estrogens, which seems to generate a durable Lp(a) suppressing effect. For this reason, an occasional testosterone "vacation" might also be considered.

So far, I've advised several people to try this. The long-term success or failure, however, is uncertain. I know of no other solutions, however.

If you have Lp(a) and are on long-term niacin, you should consider talking about this issue with your physician. Like many aspects of Lp(a), while fascinating in its complexity, much remains uncertain. Stay tuned.

When LDL is more than meets the eye

Jerry wanted to know what to do with his LDL cholesterol of 112 mg/dl. "My doctor said that it's not high but it could be better."

So I asked him what the other numbers on his lipid panel showed. He pulled out the results:

LDL cholesterol 112 mg/dl

HDL 32 mg/dl

Triglycerides 159 mg/dl


I pointed out to Jerry that, given the low HDL and high triglycerides, his calculated LDL of 112 was likely inaccurate. In fact, if measured, LDL was probably more like 140-180 mg/dl. LDL particles were also virtually guaranteed to be small, since low HDL and small LDL usually go hand-in-hand (though small LDL can still occur with a good HDL).

So Jerry's LDL is really much higher than it appears. To prove it, Jerry will require an additional test, preferably one in which LDL is measured, such as LDL particle number (NMR), apoprotein B, or "direct" LDL.

It's really quite simple. Jerry likely has a high number of LDL particles that are too small. This pattern confers a three- to six-fold increased risk for heart disease.

Treatment requires more than just reducing LDL. Small LDL--an important component of this pattern, responds, for instance, to a reduction in processed carbohydrates like wheat products (breads, breakfast cereals, pretzels, etc.), NOT to a low-fat diet. Weight loss to ideal weight, especially loss of abdominal fat, will yield huge improvements in these numbers. Niacin may be a necessary component of Jerry's treatment program, since it increases LDL size and raises HDL.

For more discussion on measures superior to LDL cholesterol, see my upcoming editorial, Let Dr. Friedewald Lie in Peace (an expansion of a previous Heart Scan Blog). It will be posted on the Cardiologist on Call column on the Track Your Plaque website within the next week.)

Oil-based vitamin D


As time passes, I gain greater and greater respect for the power of restoring vitamin D blood levels to normal, i.e. 50-70 ng/ml. Just yesterday, I saw several people with blood levels of <10 ng/ml--severe deficiency.

Vitamin D deficiency this severe poses long-term risk for osteoporosis, arthritis, colon cancer, prostate cancer, inflammatory diseases, diabetes, and heart disease. Vitamin D appears to make coronary plaque reversal--reduction of your heart scan score--easier and faster.

But it is important that you take the right kind of vitamin D. Several of the people I saw yesterday with vitamin D levels of somebody living in total darkness were taking vitamin D, but they were taking tablets. Tablets are the wrong form. Powder-based tablets, in my experience, yield little or no rise in blood levels. Some preparations generate a small rise but the dose required is huge.

If you're going to take vitamin D, take a preparation that yields genuine and substantial rises in blood levels. This requires an oil-based capsule. I commonly see blood levels of 25-OH-vitamin D3 rise from, say, 10 ng/dl to 60 ng/ml when oil-based capsules are taken.

The most common dose I prescribe to patients is 2000 units per day to females, 3000-4000 units per day to males in non-sun exposed months. Ideally, your dose is adjusted to blood levels.

The Vitamin Shoppe preparation pictured here is one I've used successfully and generates bona fide rises in blood levels. And it costs around $5. Just be sure the preparation you buy is oil-based.

For rapid success, try the "fast" track

Have you tried fasting?

Before your eyes glaze over, let me tell you what I mean. I don't mean a water-only fast for two weeks while you drool over all the temptations around you and you feel sorry for yourself.

I also don't mean the juice fasts that some people use that turn into fruit juice fasts of pure sugar.

Here's another way to do it. Usually, 48 hours of doing this will yield several benefits:

--Weight loss of 1 lb. You will likely experience an even greater weight loss of 2-4 lbs, but much of this will be water loss.

--If you're like me and share a heightened sensitivity to sugars and carbohydrates (like wheat), you may find out just how awful you feel when you eat certain foods. Many people tell me they feel absolutely wonderful when they fast--clearer thinking, increased energy, improved mood. Not the constant gnawing urge to eat they expected.

--After your fast is over, you look back and realize just what large portions of food you were eating. You'll be content with smaller quantities--and enjoy it more.


The "fast" I've used successfully includes two foods:

1) Vegetable juices--that you either juice yourself or purchase. V8 or its equivalent works pretty well. Though purchased V8 is not the best, it's better than nothing and does work reasonably well. If you juice your own vegetable juices, watch out for the diarrhea if you're unaccustomed to vegetable juices. Four 8 oz glasses per day works well.

2) Soy milk--for a source of protein and modest quantity of sugar and fat. I like the Light Silk Soymilk (Vanilla) which contains 80 calories, 2 g fat (0.5 g monounsaturated), 7 g sugar, 6 g protein per 8 oz glass. Four 8 oz glasses of soymilk also work well. In my neighborhood, 8th Continent is another good choice.


Sip both of these throughout the day. Of course, drink water in unrestricted amounts.

What can you expect in your coronary plaque control/heart scan score reversal program? When the fast is over, a rise in HDL, reduction in small LDL, reduction in triglycerides, reduction in blood sugar and insulin, and a smaller tummy. This strategy can be useful to kick-start weight loss efforts or as a periodic way to maintain control over weight and lipid/lipoprotein patterns.


Nutritional Composition Silk Soymilk--Vanilla

Nutrition Facts
Serving Size 1 cup (240mL)
Servings per container 8 H/G OR 4 QT

Amount per Serving

Calories 70
Calories from Fat 20

% Daily Value
Total Fat 2g 3%
Saturated Fat 0g 0%
Trans Fat 0g
Polyunsaturated Fat 1g
Monounsaturated Fat 0.5g

Cholesterol 0mg 0%
Sodium 120mg 5%
Potassium 300mg 8%
Total Carbohydrates 8g 3%
Dietary Fiber 1g 4%
Sugars 6g
Protein 6g
Vitamin A 10%
Vitamin C 0%
Calcium 30%
Iron 6%
Vitamin D 30%
Riboflavin 30%
Folate 6%
Vitamin B12 50%
Magnesium 10%
Zinc 4%
Selenium 8%
AGEing gracefully

AGEing gracefully

Advanced Glycation End-products, or AGEs, have the potential to change our entire conversation about diet.

AGEs come from two principal sources:

1) Endogenous--Glucose-protein interactions that arise from high blood glucose levels

2) Exogenous--From diet

The first is sensitive to glucose levels: the higher the glucose level, the greater the AGE formation. The second depends on the quantity of AGE in the food consumed.

A compelling body of evidence points towards AGEs as an agent of aging, as well as kidney dysfunction, dementia, and atherosclerosis. Some of the observations made include:

--If AGEs are infused into an experimental animal, it develops atherosclerosis, kidney disease, and other "diseases of senescence" within weeks to months.

--In endothelial cells (cells lining arteries), AGE induces expression of adhesion molecules and inflammatory signals. In fibroblasts, AGE provokes collagen production. In smooth muscle cells, AGE triggers migration and proliferation. In monocytes and macrophages, AGEs induce chemotaxis and release of inflammation mediators. In short, AGEs have been implicated in just about every step leading to atherosclerosis.

--In humans, greater quantities of AGEs are present in diabetics, pre-diabetics and people with insulin resistance. We all know that these people develop atherosclerosis, kidney disease, cataracts, and other conditions at an accelerated rate.

--Foods containing greater quantities of AGEs cause endothelial dysfunction, i.e., artery constriction via blockade of nitric oxide and other mechanisms.

Short of taking agents that block AGE activity, how can you minimize the absorption or production of AGEs? There are two general strategies:

1) Keep blood glucose low--The Whitehall study demonstrated increased cardiovascular mortality with a postprandial (actually 2-hour post- 50-gram glucose challenge) blood sugar of 83 mg/dl. Lower blood glucose, less glycation. Less carbohydrates in the diet, the lower the blood sugar, the less the glycation. Studies like Whitehall demonstrate that glycation begins with glucose values within the normal range. Thus, aging occurs even with normal glucose levels. It occurs faster with higher glucose levels.

2) Choose and prepare foods with lower AGE content. Food content of AGEs is a major determinant of blood AGE levels. Fats and meats are the primary dietary source of AGEs, particularly if cooked at high temperature (broiling, frying). While this does not mean that meats and fats need to be avoided, it can mean that limiting serving size of meats and fats, while being selective in how they are prepared, are important. This can mean cutting your meats in thinner slices or smaller pieces to permit faster cooking, eating rare when possible (not poultry, of course), avoiding cooking with sauces that contain sugar (which enhances AGE formation). Is this an argument in favor of sashimi?

Minimizing exposure to AGEs, endogenous or exogenous, has the potential to slow the aging process, or at least to lessen the likelihood of many of the phenomena of aging.

More on this to come.

Comments (32) -

  • yoyo

    5/5/2010 11:17:44 AM |

    I'm more worried about endogenous AGEs; exogenous the evidence seems a bit more mixed.

    Are food advanced glycation end products toxic in biological systems?

    Chuyen NV, Arai H, Nakanishi T, Utsunomiya N.

    Japan Women's University, Department of Food and Nutrition, 2-8-1 Mejiro-dai, Bunkyo-ku, Tokyo 8681, Japan. nvc@fc.jwu.ac.jp
    Abstract

    Model food advanced glycation end products (AGEs) were prepared as glycated casein (GC) and glycated soy protein (GS) by the reaction of casein or soy protein with glucose at 50 degrees C, relative humidity 75% for seven days in a powder state. These browned proteins were used as materials for animal experiments. A mixture of 20% glycated proteins (GC:GS = 1:1) diet was fed to streptozotocin (STZ)-diabetic rats for 11 weeks. The results showed that: (1) fructoselysine was observed in the hepatic portal veins, arteries, and femoral veins of rats fed with glycated proteins after 2 h of feeding; (2) blood sugar of glycated protein-fed rats was lower than that of diabetic rats fed with intact protein, while HbA1C in blood and glucose in urine of both groups were similar; (3) lipid peroxidation status in serum, liver, and kidney of both groups was similar; (4) superoxide dismutase (SOD) and glutathione-S-transferase (GST) enzymatic activity in serum and liver of both groups were also similar; (5) there were no differences in degree of cataract formation and concentration of glucose, fructose, sorbitol, and lipid peroxide in the lenses of both groups. From the above results, it can be estimated that food AGEs are not toxic in biological systems, and reactive oxygen species increase in diabetic rats is not caused by glycated proteins but by other pathways.

    PMID: 16037268 [PubMed - indexed for MEDLINE]

    Unfortunately, starches have much lower AGE content. Any preparation of meat has large amounts, though still variable. This might be why high-carb diets work well for traditional societies where obesity is not common.

  • Joel

    5/5/2010 11:49:11 AM |

    Less carbs, less meats, less fats--sounds like you're just promoting calorie restriction since that doesn't leave much that you can eat in significant quantities.

  • Denny Barnes

    5/5/2010 12:16:33 PM |

    Looking forward to your future writings on AGEs. I hope you will talk about the role of fructose which can form ten times as many AGEs as glucose. Not all carbs are created equal. As a fellow T2 diabetic, I think we focus too much on blood glucose and miss the stealth carb -- frutose.  It is by far the most insidious.

    Forgive me for saying it, but I feel that the ghost of your vegetarian past still haunts your writing.  Yes, barbecued, fried and broiled meats can have way too much AGEs, especially if cooked with sweet sauces, but animal protein cooked with water has 1/10 as many AGEs. I am a happy carnivore who loves stewed meats and chicken and steamed fish.

  • Martin Levac

    5/5/2010 12:49:37 PM |

    Then there's ketosis which stimulates something called chaperone-mediated autophagy (CMA). This process is basically the recycling of junk protein. AGEs would constitute such junk. So it's not only a question of low blood glucose but of ketosis as well. Incidentally, if one eats only meat or very little carbs, then he will be in ketosis most of the time. In that sense, it doesn't matter how much AGEs come from this diet since the same diet would provide the recyclers as well. Here's the post by Eades on the subject:

    http://www.proteinpower.com/drmike/ketones-and-ketosis/ketosis-cleans-our-cells/

  • Ned Kock

    5/5/2010 1:20:12 PM |

    Supporting your point regarding endogenous AGEing, there is also reliable evidence that blood glucose control before age 55 may increase your chances of living beyond 90:

    http://healthcorrelator.blogspot.com/2010/04/blood-glucose-control-before-age-55-may.html

    However, I am yet to see reliable evidence that significant damage can be caused by ingested AGEs through cooked meat and fat (e.g., resulting from Maillard reactions).

    I don't doubt that injecting AGEs into model animals, particularly rodents, will lead to problems. But human digestion in a healthy person (e.g., no leaky gut) is another story. Moreover, cooked meat is denatured and thus rendered more easily digestible.

  • Jen

    5/5/2010 3:42:07 PM |

    Thanks for the post Dr. Davis!

    I would love to get info on what happens to the body as you are lowering your blood sugar via diet.  I have been using a monitor and feel my best at around 85 but at times crave sugar pretty bad and have energy spikes and dips.  I exercise too, so curious how this factors in?

  • Apra -- The Shaman

    5/5/2010 3:42:07 PM |

    I agree with Yoyo.  It seems to me this could be another red herring, like the dietary cholesterol nonsense.  Until they can tease apart whether the issue is due to dietary AGEs of the stuff produced from hyperglycemia then I don't necessarily see any reason to jump on an anti-meat bandwagon.

    Still, if you're truly concerned, invest in some Sous Vide equipment and cook your meat at low temperatures and don't finish it with a nice sear.

  • Stephan

    5/5/2010 6:36:09 PM |

    I just read the Whitehall study, it really didn't show that CHD mortality increases from 83 mg/dL.  That's based on their mathematical extrapolation, which didn't fit the actual data very well at the lower range of blood glucose.  According to the data itself, CHD risk didn't begin increasing until 5.7 mmol/L, or 102 mg/dL.  

    That makes sense because 83 mg/dL is totally normal fasting glucose.

  • Adolfo David

    5/5/2010 9:55:08 PM |

    Sad to say: Dr Michael Holick recommends at the end of his new book VITAMIN D SOLUTION essentially one brand of vitamin D supplements: Nature Made! :S

  • Anonymous

    5/6/2010 1:02:37 AM |

    2 things might help AGE's.
    I read that Carnosine which is a combo of 2 amino acids helps prevent glycation and many anti-aging experts recommend this supplement.
    Metformin reduces glucose production in the liver, reduces glucose absorption in the intestines and increases tissue sensitivity to actual glucose in the blood.
    Also may decrease cancer risk
    I have started these supplements in hopes of combating AGE's

  • Lori Miller

    5/6/2010 1:29:00 AM |

    Another way to cook meat quickly is by using a pressure cooker. The 1.5-pound roast I'm having for dinner was done in 20 minutes--15 probably would have been fine. The package called for roasting it for four hours in the oven.

  • Anonymous

    5/6/2010 2:05:20 AM |

    A fasting glucose of 80-109 mg/dl was optimal for CVD and overall mortality in this paper.

    http://circ.ahajournals.org/cgi/content/full/101/17/2047

  • pmpctek

    5/6/2010 2:51:51 AM |

    I've heard that Benfotiamine (200mg twice/day) is a potent AGE inhibitor.  I haven't been able to find much study on humans that backs up that claim though.

  • Anonymous

    5/6/2010 4:19:34 AM |

    Forgive my extreme ingnorance in this area, but how do meat and fats contain AGEs?

    A grilled steak? An egg fried in coconut oil? Where is the source of glucose here?

  • Fran

    5/6/2010 4:29:09 AM |

    "Fats and meats are the primary dietary source of AGEs..." I'm sorry, but this makes no sense to me... that fats and meats will increase blood sugar levels. My understanding to this point is that carbs are the cause, while good saturated fats and protein stabilize blood sugar levels.

  • Dr. John Mitchell

    5/6/2010 4:31:51 AM |

    I'd like to see references for many of your statements.

  • Bruce

    5/6/2010 4:34:46 AM |

    May I offer a little anecdotal evidence? After hearing a researcher from Australia's Baker Heart Institute describe how a low exogenous AGE diet appeared to reverse the complications of Type II Diabetes - although not Diabetic, I was intrigued enough to devise my own low-AGE regime.

    During the subsequent 5 months, with no attempt to restrict calories, I have lost nearly 15 kg, have had my total Cholesterol drop from 5.9 to 4.6, blood pressure drop from 128/88 to 110/62. Part of my strategy has been to avoid all sugars, including most fructose sources, in the interest of limiting endogenous AGE formation.

    BTW, I am 60 years (suddenly) young.

  • Michael Barker

    5/6/2010 2:57:54 PM |

    Humans have been cooking meats, at least, 100,000 years before the invention of agriculture. The fact that it is so ubiquitous suggests that we are quite adapted to this even without thinner slices or smaller portions.

  • Anonymous

    5/6/2010 3:26:07 PM |

    Marinating meat with acid (vinegar) before grilling greatly reduces the maillard reaction and the formation of AGEs in meat.

  • Peter

    5/6/2010 4:48:23 PM |

    As we learn more about food, we learn more about the downsides: fish have mercury, meat has AGE's, carbs increase insulin sensitivity, etc. If you ask an expert what to eat, each one gives you a different answer.  How can we tell truth from belief?

  • CB Predator

    5/7/2010 10:50:32 AM |

    I wanted to thank you for this great read!! I definitely enjoying every little bit of it I have you bookmarked to check out new stuff you post

  • foodnearsnellville

    5/7/2010 4:54:40 PM |

    At what point is research like this going to limit the use of sugary glazes and marinades in meats and restaurant foods?

  • Anne

    5/8/2010 12:05:57 PM |

    Could adding spices and herbs reduce the bad effects of cooked meat. The study is small and funded by McCormick. Simple Addition to Meat Helps

  • Marianne

    5/8/2010 9:22:51 PM |

    Just discovered this blog so forgive me if this has already been covered.  What about Neu5Gc?  Some recommend all mammal products be avoided as they all contain this substance and it sets up an inflammatory process in the body as humans do not have Neu5Gc and recognize it as foreign.  I  have recently been poking around at eating better (not that my past was bad!) and I have never been so confused in my entire life!!! Everyone has their own opinion and most of it is contradictory. High carb, low carb, no meat, more meat, more fish, all whole grains.  It's like a crap shoot.

  • yoyo

    5/9/2010 10:57:30 AM |

    I don't have access to the original study, but the best one i could find has the food levels of AGEs reproduced with some comments at this gentleman's blog: http://inhumanexperiment.blogspot.com/2009/09/age-content-of-foods.html

    meat, even with low heat low pH preparations, seems to be high. eggs and legumes are low for their protein content.

  • Dr. William Davis

    5/9/2010 12:25:34 PM |

    Yoyo, Joel--

    Much of the work on the AGE content of food, its absorption, and its consequences have been generated by Dr. Helen Vlassara's group in New York. The Japanese group Yoyo cites has, indeed, found some conflicting observations.

    I do not think that we can construct an "AGE-free" diet nor lifestyle, nor are the data on AGE-blockers sufficiently solid to justify taking them, in my view.

    However, this is such a fascinating line of research that I think it's worth being aware of and discussing.

  • Dr. William Davis

    5/9/2010 12:33:50 PM |

    Bruce--

    Fascinating experience!

    How did you handle the AGE in meats issue?

  • Dr. William Davis

    5/9/2010 12:36:17 PM |

    Marianne--

    Sorry, no insights into Neu5Gc.

    As I mentioned in the post, this is not a "no meat" comment. It is simply discussing the fascinating observations made by Helen Vlassara's group that, when taken as a whole, fit like a perfect puzzle piece into the question of why people with high blood sugars, e.g., diabetics and pre-diabetics, develop all the undesirable health effects they do.

  • Bruce

    5/9/2010 11:50:47 PM |

    May I add a few more comments?

    Regarding meat, I have been eating normal and even generous portions - but I purchased a steamer and slow cooker to keep the cooking temps as low as possible. There is a limit in how far you can lower exogenous AGEs unless you adopt an extreme Raw regime.

    Then, your body will still produce its baseline of indogenous AGEs. I eat virtually zero sugar except for a minimal amount of fruit - usually 2 servings or 3 per day at most.

    We're really talking about a low Maillard Reaction Products diet, then I think. AGEs are many in type and the chemistry is complex. But there is good and growing evidence that the overall mix of MRPs are toxic. One study I read stated that lowering the exogenous AGE load by 40% reduces the circulating AGEs  by 60% and at this level, the body's own ability to scavenge out these compounds recovers.

    This suggests to me that we can tolerate MRPs up to a certain level, but the western diet is increasingly loading with these compounds. I wonder if this provides a (at least) partial explanation of the obestity epidemic.

    Food has been plentiful and cheap for at least 3 generations now, yet obesity is 'exploding' at the same time that the food industry is in an 'arms race' to heighten the marketability of their products.

  • Kevin

    5/10/2010 3:38:54 PM |

    I wonder how calorie restriction affects AGEs.  Is this possibly how CR influences longevity?  

    kevin

  • Santiago

    5/10/2010 11:34:41 PM |

    Hi Dr Davis
    I've hear from some diabetics how honey doesn't seem to affect them that bad.
    I looked arround and found some studies showing that honey after eaten for a while lowers blood sugar levels improiving liver function.
    Was wondering if you have an opinion related to honey

  • Anonymous

    8/30/2010 3:50:39 PM |

    So don't eat meat or carbs.  Good advice.

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