Jogging does NOT cause heart disease 14. June 2009 William Davis (20) Periodically, I'll come across a knuckleheaded report like this one from Minneapolis:Marathon Man’s Heart Damaged by Running?Of course, the obligatory story about how a cardiologist came to the rescue and "saved his life" with a stent follows. In other words, a stent purportedly saved the life of this vigorous man with no symptoms and high capacity for exercise. Does vigorous exercise, whether it's marathon running, long-distance biking, or triathlons, cause coronary disease? Should all vigorous athletes run to their doctor to see if they, too, need their lives to be "saved."Let me tell you what's really going on here. People with the genetic pattern lipoprotein(a), or Lp(a), tend to be slender, intelligent and athletic. For genetic reasons, these people gravitate towards endurance sports like long-distance running. Lp(a) is a high-risk factor for coronary disease. It is the abnormality present in the majority of slender, healthy people who are shocked when they receive a high heart scan score or have a heart attack or receive a stent. (I call Lp(a) "the most aggressive known coronary risk factor that nobody's heard about.")The association between endurance exercise and heart disease is just that: an association. It does not mean that exercise is causal. Having seen coronary plaque detected with heart scans in many runners, virtually all of whom demonstrated increased Lp(a), I believe that Lp(a) is causal. Unfortunately, the man in the Minneapolis story, now that his life is "saved," will likely be advised to take a statin drug and follow a low-fat diet . . . you know, the diet that increases Lp(a).
Warning: Your pharmacist may be hazardous to your health 12. June 2009 William Davis (24) Pharmacists can be very helpful resources when it comes to questions about prescription drugs. The operant word here is drugs.What they are most definitely not expert on are nutritional supplements. In fact, a day doesn't pass by without having to dispell one falsehood or another conveyed to a patient about a nutritional supplement by a pharmacist.Among the more common falsehoods told to patients by pharmacists:"You have to take Niaspan. Sloniacin doesn't work." Patent nonsense. A few years back, I was the largest prescriber of Niaspan in Wisconsin. Although I am embarassed to admit it, I also spoke for the company, educating fellow physicians on the value of niacin for correction of lipid disorders. Then I shifted to Sloniacin due to cost--it costs 1/20th the cost of prescription Niaspan. I examined the pharmacokinetic data (pattern of release in the body), the published literature (e.g., the famous HATS Trial), and have used Sloniacin over 1000 times in patients. In my experience, there is no difference: no difference in efficacy, no difference in safety, no difference in side-effects. There is a BIG difference in price. Unfortunately, most pharmacists get their information on niacin from the Niaspan representative. "You shouldn't be taking vitamin D supplements. I have prescription vitamin D here." What the pharmacist means is that you should replace your vitamin D3, or cholecalciferol--the form recognized as vitamin D by the human body--with the plant form of vitamin D, vitamin D2 or ergocalciferol. Since when is a plant form of a hormone (vitamin D is a potent hormone, not a vitamin; it was misnamed) better than the human form? I've previously talked about this issue in a blog post called Vitamin D for the pharmaceutically challenged.The notion that D2 is somehow superior to the real thing, D3, is absurd. I use D3 only in my practice and have checked blood levels thousands of times. As long as the D3 comes as a gelcap, drops, or powder in a capsule, it works great, yielding predictable and substantial increases in blood levels of 25-hydroxy vitamin D. If it comes as prescription D2 (or over-the-counter D2), I have seen many failures: no increase in blood levels of vitamin D or meager increases.Prescription status is no guarantee of effectiveness. "Why do you need iodine? You already get enough from food."The NHANES data over the last 25 years argue otherwise: Iodine deficiency is growing, particularly as people are avoiding iodized salt and the iodine content of processed foods is diminishing. The explosion in goiters in my office also suggest this is no longer a settled issue. On the positive side, it is exceptionally easy to remedy with an inexpensive iodine supplement. That is, until the pharmacist intervenes and injects his bit of nutritional mis-information. I'm not bashing pharmacists. In fact, Track Your Plaque's own Dr. BG has a pharmacy background, and she is an absolute genius with nutritonal supplements. But she is a rare exception to the rule: Most pharmacists know virtually nothing about nutritional supplements. You might as well ask your hairdresser.
"Healthy" people are the most iodine deficient 5. June 2009 William Davis (27) Ironically, the healthiest people are the most likely to be deficient in iodine. Why? Healthy people tend to: --Avoid iodized salt because of public health advice to limit sodium--Use sea salt to obtain minerals like magnesium--but sea salt contains little iodine--Limit meat--Carnivores obtain more iodine than vegetarians or vegans. In one study, up to 80% of vegans were iodine-deficient (Krajcovicova-Kudlackova M et al 2003). --Exercise--Substantial amounts of iodine are lost through sweating. In a study of high school soccer players, 38.5% were severely iodine deficient, compared to 2% of sedentary students (Mao IF et al 2001). That is indeed what I am seeing in my office, as well: The healthiest, most attentive to healthy eating, and most physically active are the ones showing up with small goiters (enlarged thyroid glands) and increased TSH and low free T4 levels. Why am I checking thyroid and talking about iodine? Because even the smallest degree of thyroid dysfunction can double, triple, or quadruple your risk for cardiovascular events. See the posts Is normal TSH too high? and Thyroid perspective update.
What kind of iodine do you take? 4. June 2009 William Davis (21) The results of the latest Heart Scan Blog poll are in. 204 respondents answered the question: Do you take an iodine supplement? The responses:Yes, I take Iodoral, Lugol's, or SSKI 26 (12%) Yes, I take potassium or sodium iodide 19 (9%) Yes, I take kelp tablets or powder 64 (31%) No, I rely on generous use of iodized salt 23 (11%) No, I don't supplement iodine at all 66 (32%) Isn't iodine something you put on cuts and scratches? 6 (2%) I am heartened by the number of respondents taking iodine in some form. After all, iodine is an essential trace mineral. Without it and health suffers, often dramatically.However, I am concerned by the percentage of people who don't supplement iodine at all: 32%. Interestingly, this is approximately the proportion of people who come to my office who also do not supplement iodine who are now showing goiters, or enlarged thyroid glands due to iodine deficiency. Goiters lead to hypothyroidism (low thyroid hormone levels), followed by hyperactive nodules, not to mention undesirable effects like weight gain, fatigue, hair loss, constipation, intolerance to cold, higher LDL cholesterol and triglycerides, and heart disease. 11% of respondents report using lots of iodized salt. This may or may not be sufficient to provide enough iodine to prevent goiter and allow normal thyroid function. The success of this strategy depends to a great extent on how often salt is purchased. Salt that sits on the shelf for more than a month is devoid of iodine, given iodine's volatility.I am also favorably impressed by the number of people who take "serious" iodine supplements like Lugol's solution, Iodoral, or SSKI. Of course, people who read The Heart Scan Blog tend to be an unusually informed, healthy population. The 12% of people in the poll who take these forms of iodine does clearly not mean that 12% of the general population also takes them. But 12% is more than I would have predicted. On the Track Your Plaque website, we are awaiting an interview with iodine expert, Dr. Lyn Patrick. I'm hoping for some juicy insights.
And you thought gasoline was expensive 2. June 2009 William Davis (5) In 1995, the Palmaz coronary stent was introduced, the brainchild of Drs. Julio Palmaz and Richard Schatz. Medical device manufacturer, Johnson & Johnson, priced the device at $2500 per stent. Let's put this into perspective: At just 0.05 grams per 15 millimeter stent, that put the price of the common stainless steel used to manufacture the stent at $22,650,000 per pound. Only after several competing stents finally made it to market did J&J reduce its price to its bargain price of $1200, or $10,872,000 per pound. And to think that most of us were shocked to find out that the U.S. military paid $200 for a hammer. Since 1995, a competitive market for stents has developed, pushing prices down. Now, you can purchase a brand-new coronary stent for as little as $4,000,000 per pound. Medical device manufacturers have been guilty of a degree of greed that would make many Wall Street bankers blush. That's why I call medical devices "the industry of infinite markups."
"Hey buddy, wanna buy some exorphins?" 31. May 2009 William Davis (18) Dr. Christine Zioudrou and colleagues at the National Institutes of Mental Health got this conversation going back in 1979 with their paper, Opioid peptides derived from food proteins: The exorphins.Exorphins are exogenously-derived peptides (i.e., short amino acid sequences obtained from outside the body) that exert morphine-like properties. Mimicking the digestive process that occurs in the gastrointestinal tract using the gastric enzyme, pepsin, and hydrochloric acid (stomach acid), Zioudrou et al isolated peptides from wheat gluten with morphine-like activity. They followed this research path because of the apparent association of wheat and mental illness. In the bioassays used, wheat-derived exorphins competed successfully with the endogenous opiate, met-enkephalin. Interestingly, casein-derived (i.e., casein milk protein) exorphins were also identified that also displayed opiate-binding activity, though less powerfully. The morphine-like activity was also blocked by the drug, naloxone (the same stuff given to people exposed to morphine overdose). Among the many devastating effects of celiac disease , the immune disease that develops from wheat gluten exposure, are mental and emotional effects, such as anxiety, fatigue, mental "fog," depression, bipolar illness, and schizophrenia, that disappear with removal of gluten. Many parents of autistic children also advocate wheat-free diets for similar reasons. Among the many wonderful comments posted on the last Heart Scan Blog post, "I can't do it," was Anne's: I am not the Anne in your post, but I was addicted to wheat. It was my favorite food. I lived on and for breads. Then I discovered I was gluten sensitive and I did go through a withdrawal of about 4 days. After 4 days I noticed my health problems were disappearing. Depression, brain fog and joint pain are 3 of the many symptoms that disappeared. That was 6 yrs ago. Tell Anne that I had dreams about bread in the beginning - they will pass. Now the donuts, breads, cookies and cakes in the stores and at work don't even look good. In fact, I don't like the smell of bread anymore. It takes time, but the cravings do pass.Combine wheat"s exorphin-driven addictive potential with its flagrant blood sugar-increasing properties, and you have a formula that:1) makes you fat2) increases likelihood of diabetes, and 3) makes you want to keep on doing it. Reminds me of nicotine. My personal view: I have absolutely no remaining doubt that wheat products have no place in the human diet. Not only does the research provide a plausible basis for its adverse health effects, but having asked hundreds of people to remove it from their habits has yielded consistent and remarkable health benefits. Just read the reader comments here and here.
"I can't do it" 30. May 2009 William Davis (20) Anne sat across from me, bent over and sobbing. "I can't do it. I just can't do it! I cut out the breads and pasta for two days, then I start dreaming about it!"And my husband is no help. He knows I'm trying to get off the wheat. But then he brings home a bunch of Danish or something. He knows I can't help myself!"Having asked hundreds of people to completely remove wheat from their diet, I witness 30% of them go through such emotional and physical turmoil, not uncommonly to the point of tears. For about 10-20% of people who try, it is as hard as quitting cigarettes. Make no mistake about it: For many people, wheat is addictive. It meets all the criteria for an addictive product: People crave it, consuming it creates a desire for more, lacking it triggers a withdrawal phenomenon. If wheat were illegal, there would surely be an active underground trafficking illicit bagels and pretzels. Withdrawal consists of fatigue and mental fogginess that usually lasts 5-7 days. Just like quitting smoking, wheat withdrawal is harmless but no less profound in severity.People who lack an addictive relationship with wheat usually have no idea what I'm talking about. To them, wheat is simply a grain, no different than oats. But wheat addicts immediately know who they are. They are the ones who can't resist the warm dinner rolls served at the Italian restaurant, need to include something made of wheat at every meal, and crave it every 2 hours (matching the cycle of blood sugar peaks and valleys, the "valley" triggering the craving). When they stop the flow of immediately-released glucose that comes from wheat (with blood sugar peaks that occur higher and faster than table sugar), irresistible cravings kick in. Then watch out: They'll bite your hand off if you reach for that roll before they do. Break the cycle and the body is confused: Where's the sugar? The body is accustomed to receiving a constant flow of easily-digested sugars. Once the constant influx of sugars ceases, it takes 5-7 days for metabolism to shift towards fat mobilization as a source of energy. But along with fat mobilization comes a shrinking tummy, reducing the characteristic wheat belly. If you try to quit smoking, you've got "crutches" like nicotine patches and gum, Zyban, Chantix, hypnosis, and group therapy sessions. If you try and quit wheat, what have you got? Nothing, to my knowledge. Nothing but sheer will power to divorce yourself from this enormously destructive, diabetes-causing, small LDL-increasing, inflammation-provoking, and addictive substance.
Spontaneous combustion, vampires, and goitrogens 26. May 2009 William Davis (17) What do the following have in common:Lima beansFlaxseedBroccoliCabbageKaleSoyMilletSorghum?They are all classified as goitrogens, or foods that have been shown to trigger goiter, or thyroid gland enlargement. Most of them do this either by blocking iodine uptake in the thyroid gland or by blocking the enzyme, thyroid peroxidase. This effect can lead to reduction in thyroid hormone output by the thyroid gland, which then triggers increased thyroid stimulating hormone (TSH) by the pituitary; increased TSH acts as a growth factor on the thyroid, thus goiter. Add to this list of goitrogens the flavonoid, quercertin, found in abundance in red wine, grapes, apples, capers, tomatoes, cherries, raspberries, teas, and onions. Most of us obtain around 30 mg per day from our diet. Quercetin, often touted as a healthy flavonoid alongside resveratrol (e.g., Yang JY et al 2008), has been shown to be associated with reduced risk for heart disease and cancer. Many people even take quercetin as a nutritional supplement. Quercetin has also been identified as a goitrogen (Giuliani C et al 2008). What to make of all this?Most of these observations have been made in in vitro ("test tube") preparations or in mice. Rabbits who consume a cabbage-only diet can develop goiter. How about humans? The few trials conducted in humans have shown little or no effect. In most instances, the adverse effects of goitrogens have been eliminated with supplemental iodine. In other words, goitrogens seem to exert their ill thyroid effects when iodine deficiency is present. Restore iodine . . . no more goitrogens (with rare exceptions). Should we as humans adopt a diet that avoids apples, grapes, tomatoes, red wine, tea, onions, soy etc. on the small chance that we will develop goiter? I believe that we should avoid these common food-sourced goitrogens with as much enthusiasm as we should be worried about spontaneous combustion of humans or the appearance of vampires on our front porches. We are as likely to suffer low thyroid activity from quercetin or other "goitrogens" as we are to experience the "mitochondrial explosions" that are purported to set innocent people afire.
Magnesium and you-Part II 25. May 2009 William Davis (17) Blood magnesium levels are a poor barometer for true body (intracellular) magnesium. Only 1% of the body’s magnesium is in the blood, the remaining 99% stored in various body tissues, particularly bone and muscle. If blood magnesium is low, cellular magnesium levels are indeed low—very low. If blood magnesium is normal, cellular or tissue levels of magnesium may still be low. Unfortunately, tissue magnesium levels are not easy to obtain in living, breathing humans. In all practicality, a blood magnesium test only helps if it’s low, while normal levels don’t necessarily mean anything and may provide false reassurance.Short of performing a biopsy to measure tissue magnesium levels, several signs provide a tip-off that magnesium may be low:• Heart arrhythmias—Having any sort of heart rhythm disorder should cause you to question whether magnesium levels in your body are adequate, since low magnesium levels trigger abnormal heart rhythms. In fact, in the hospital we give intravenous magnesium to quiet down abnormal rhythms. • Low potassium— Low magnesium commonly accompanies low potassium. Potassium is another electrolyte depleted by diuretic use and is commonly deficient in many conditions (e.g., excessive alcohol use, hypertension, loss from malabsorption or diarrhea). Like magnesium, potassium may not be fully replenished by modern diets. • Muscle cramps— Magnesium regulates muscle contraction. Leg cramps, or “charlie-horses”, painful vise-like cramps in calves, fingers, or other muscles, are a common symptom of magnesium deficiency. (Leg cramps that occur with physical activity, such as walking, are usually due to atherosclerotic blockages in the leg or abdominal arteries, not low magnesium.)• Migraine headaches—Reflective of magnesium’s role in regulating blood vessel tone, low magnesium can trigger vascular spasm in the blood vessels of the brain. In some emergency rooms, they will actually administer intravenous magnesium to break a migraine. • Metabolic syndrome—Magnesium plays a fundamental role in regulating insulin responses. Metabolic syndrome (low HDL, high triglycerides, small LDL, high blood pressure, increased blood sugar, excessive abdominal fat, etc.) is triggered by insulin responses gone awry and is clearly linked to low magnesium levels. The absence of any of these tell-tale signs does not necessarily mean that tissue levels of magnesium are normal. Then how do you really know? There really is no easy, available method to gauge body magnesium. As a practical solution, we therefore have aimed for maintaining serum levels of >2.1 mg/dl or RBC magnesium (a surrogate for tissue levels) of >6.0 mg/dl. (Going too high is not good either, so occasional monitoring really helps. However, I've only seen this once in a psychotic woman who drank ungodly amounts of magnesium-containing antacids for no apparent reason; she almost ended up on a respirator due to respiratory suppression by the magnesium level of 11 mg/dl!)In all practicality, because of magnesium’s crucial role in health, its widespread deficiency in Americans, and the growing depletion of magnesium in water, supplemental magnesium is necessary for nearly everyone to ensure healthy levels. More on magnesium to come.
Lethal Lipids II 22. May 2009 William Davis (7) I call the combination of low HDL, small LDL, and lipoprotein(a) "lethal lipids," since the trio is an exceptionally potent predictor for heart disease. Uncorrected, the combination is a virtual guarantee of heart disease. Ed is a perfect example of someone who came to my office recently with this pattern. His starting values:HDL: 34 mg/dlSmall LDL: 78% of total LDL NMR: Small LDL 1655 nmol/L; total LDL particle number 2122 nmol/L) Lipoprotein(a): 205 nmol/LThe atherogenicity, or plaque-causing potential, of this pattern was reflected in Ed's heart scan score of 2133. You can readily see that, of this combination, only HDL cholesterol would be adequately identified through conventional lipid testing. Small LDL and lipoprotein(a) need to be specifically measured via lipoprotein testing. And, contrary to the drug industry's "statin drugs for everybody" motto, this pattern, while improved with statin therapy, is not shut off. Specific correction of each abnormality is required. For instance, niacin addresses all three: increases HDL, reduces small LDL, and (usually) reduces lipoprotein(a). A standard low-fat diet makes this pattern worse by reducing HDL, increasing small LDL, and (usually) increasing lipoprotein(a).