The battle for natural hormones

The battle for preservation of availability of compounded natural hormones goes on.

It started with pharmaceutical manufacturer, Wyeth, who petitioned the FDA to disallow the mixing of pharmaceuticals, especially natural human hormones, by specially trained pharmacists at what are called "compounding pharmacies." These are pharmacies that have special equipment and where trained pharmacists can mix up specific preparations for dispensing. These are available by prescription.

For instance, I have been prescribing natural human testosterone and progesterone for nearly 10 years. I have found service to be excellent, with lots of learning materials provided to patients by the pharmacy. The pharmacists I've spoken to have been courteous and knowledgeable. Compounded hormones are also shockingly less expensive. While a testosterone patch from a pharmaceutical company costs around $4.00 per day, the same quantity of testosterone cream formulated by a compouding pharmacy costs around $0.50 per day--87.5% less.

Wyeth hides behind a smoke screen of concern over quality. But the price differences tells the entire story: they want to eliminate the inexpensive competition and hold us all hostage to the far more expensive, often inferior products that they produce. They'd sooner force a woman to use horse-derived Premarin than to allow her access to human estrogens and progesterone.

To me, this is an outrageous affront to our freedom of choice, both as consumers as well as a physician. If you feel as strongly as I do about opposing the unfair and bullying ways of Wyeth Pharmaceuticals and the FDA, the P2C2 association of compounding pharmacists makes writing a letter to your Senator easy by going to

http://iacprx.convio.net/site/PageServer?pagename=P2C2

Just enter your info and personalize the comments, and the e-mails will be generated for you.

Lipitor and memory

At first, I was skeptical. A book from a nutty author and physician named Duane Graveline kept on coming up in conversations with patients. His book, Lipitor: Thief of Memory , details his personal experience with dramatic changes in memory and thought while taking Lipitor.



Now this is a drug that I've seen used thousands of times. But I've now seen about a dozen people who have had distinct struggles with memory and clarity of thinking while taking Lipitor. Most took doses of 40 mg per day or more, though an occasional person takes as little as 10 mg. The association seems to be undeniable, since it improves after two weeks off the drug, recurs when resumed. Just today, I saw two people where this effect may be an issue.

Curiously, I've not seen it with any other statin agent. Unfortunately, uncovering any scientific data on the issue is a hopeless quest. Either it's very uncommon or, worse, the data has been suppressed.

Any way, I believe that Dr. Graveline was right: Lipitor, in a small number of people, does indeed seem to exert real detrimental effects on the mind.

If you take Lipitor, should you stop it in fear of long-term effects on your mental capacity? I think it's premature to toss the drug out based on this relatively uncommon relationship. This particular effect is likely to be idiosyncratic, i.e., peculiar to an occasional person but does not seem to apply to the majority, probably by some quirk of metabolism or penetrability of the barrier between the blood and nervous system tissue.

If, however, you feel that your thinking and memory have deteriorated on the drug, please speak to your doctor.

EKG's and heart disease


How helpful are EKG's for detecting hidden heart disease?

I pose this question because several patients asked this question just this week. It's also a frequent point of confusion and misperception.

Your EKG is nothing more than an expression of the surface electrical activity emitted by heart muscle activity. Multiple (12) leads are attached to the body simply to provide various "views" of this electical activity. EKG, or sometimes "ECG", is short for "electrocardiogram".

What modifies this surface electrical activity? Anything that modifies the electrical activity within the heart itself, or interferes with the detection of the activity. An old heart attack modifies the patterns of electrical conduction in the heart and that can change your EKG. An ongoing heart heart attack likewise. High blood pressure commonly creates changes in the EKG, as does lung disease. A bellyache can change your EKG, as can a stroke. (These non-heart-related phenomena probably are often due to changes in autonomic, or "automatic," nervous system activity.) The heart generates electrical activity in a predictable sequence that generates the heart beat, or "rhythm". EKG's are useful for monitoring heart rhythm, also.

Does having plaque in your coronary arteries have any effect on the EKG? None whatsoever, unless plaque rupture caused heart attack or is about to cause heart attack. So, you can have a horrendous CT heart scan score of, say, 3000, yet maintain a perfectly normal EKG, as long as the heart muscle is normal.

Then why bother with these iffy tests? They are indeed useful to diagnose the cause of active symptoms. For instance, go to the ER with chest pain and an EKG could show changes suggesting that the chest pain is a heart attack. EKG's are also useful for future comparison. Any change in EKG can suggest certain things, like new heart rhythm disturbances unrelated to coronary plaque.

Think of your EKG as just like buying a used car. Say I'm trying to sell you my 1999 Buick Century. It looks pretty good from the outside and I tell you that it has 70,000 miles and runs well. You ask to open the hood, look in the interior and take it out for a drive. I tell you no, you can't do that.

Would you buy the car? Of course you wouldn't. You were permitted only a very superficial examination of the car. You have no idea what's going on inside. Just because the paint job looks brand new doesn't mean the engine and transmission are good.

The same with your EKG: It's a superficial look at one aspect of this used car called your heart. If the EKG is normal, that's good, just like a good exterior on the Buick. But you cannot assume that the heart is otherwise normal.

View the EKG as a simple, superficial test that can only provide minimal reassurance, no matter how often you have it done.

A new Track Your Plaque record

Neal, a 40-year old school principal, and his young wife were terrified on learning of his CT heart scan score of 339, a concerningly high score for any age, particularly age 40.

To make matters worse, all of Neal's plaque was located in the critical left mainstem coronary artery, the shared stem of two of the three coronary arteries. A heart attack in this location is instantly fatal.

So, it was especially gratifying that Neal has set the Track Your Plaque record for largest magnitude of plaque reversal: 51% in his first year.

Studies that show a reduction in heart attack make the news. They talk about 1, 2, up to 6% regression, all achieved with high doses of statin drugs. Yet we are seeing huge, extraordinary quantities of heart disease reversal that haven't yet made headlines, amounts that far exceed those featured in the news. We should be encouraged by experiences like Neal's.

Watch for the upcoming Track Your Plaque newsletter for more details on Neal's story--how he came to the program, how he accomplished this huge effect, and why his experience was such a success. If you haven't yet subscribed, go to the www.cureality.com homepage and click on the upper right hand corner.

The Plavix Scam

Periodically, I'll see a flurry of TV ads for Plavix. It comes with a polished computer-animated cartoon that shows how platelets clump and form a blood clot, causing heart attack.

Imagine there's a pile of oil-soaked rags in a corner of your garage. I come by and tell you to get a good fire extinguisher to keep next to the rag pile in case they spontaneously ignite.

Does that make sense to you?

Wouldn't it be better to get rid of the oily rags and forget about the fire extinguisher?

Plavix is the fire extinguisher. The oil rags are your coronary plaque. The solution is to gain control over plaque behavior. Unfortunately, the TV ads (intentionally, I suspect) give the impression that blood clots just form out of the blue for no reason. Of course that's not true. It requires active, growing, inflamed atheroslcerotic plaque that ruptures, uncovering the "angry" and platelet-adhering material underneath the thin covering or endothelial lining.

Urging everybody to take Plavix is absurd. The TV ads urge many people who have no business taking the drug to take it. There are, without a doubt, groups of people who are better off taking Plavix and aspirin: people who are in the midst of heart attack, people who have unstable plaque, people with recent stents or bypass. Perhaps people at high risk for plaque rupture, e.g., extensive coronary plaque that has continued to grow.

These tactics are consistent with the experiences I've had with the sales representatives from the company (when I used to actually talk to sales reps; my office is now barred from them). The reps very aggressively would urge me to consider having everyone take Plavix. No kidding.


For us, i.e., for people who just have a heart scan score but interested in engaging in a powerful program of prevention and reversal, Plavix rarely provides any advantage. The answer is, just like our oily rag analogy, control the plaque, not put out the fire.

Lipoprotein(a) and small LDL

You won't find a lot of scientific validation for this, but it is my firm impression that small LDL, by some crazy means, has the capacity to "turn on" or "turn off" lipoprotein(a), Lp(a).

Recall that Lp(a) is a specific genetic trait, passed to us (if you have it) by mother or father. It falsely elevates LDL cholesterol and escalates heart disease risk more than just about any other known abnormality.

A frequent hint that Lp(a) might be present is a comment I hear often from patients: "My doctor said statin cholesterol drugs don't work for me. I tried them all and my cholesterol won't go down." Or, the result was substantially less than expected. That's because, when Lp(a) is lurking in your cholesterol value, it is unaffected by the statins.

It's been my in-the-trenches observation that, the more fully expressed the small LDL pattern becomes, the worse the Lp(a) behaves. In other words, if small LDL is suppressed effectively, Lp(a) doesn't seem to carry the same dangers as in someone who has plenty of small LDL. I don't know why this is. (I expect that the answer will come from someone like Dr. Marcovina at Stanford, who is at the forefront of Lp(a) structural research. Lp(a) is a complex molecule with several components. How and why it interacts with other particles remains a mystery.)

There are a little bit of data to confirm this. The Quebec Cardiovascular Study has presented some data to this effect, that the combination of small LDL particles and Lp(a) are a particularly lethal combination. We are trying to correlate our data from a CT heart score perspective to discern any statistical relationships.

This raises a very important therapeutic issue if you have Lp(a): the worst thing you can do if you have Lp(a) is become overweight. Excess abdominal fat is a huge trigger to create small LDL particles. Even though being overweight itself has no effect on the measured level of Lp(a), it activates small LDL which, in turn, throws gasoline on the Lp(a) fire.

If you have Lp(a), stay skinny.

Optimal medical therapy

I was re-reading some of the details behind the recently announced COURAGE Trial comparing angioplasty/stent in 1100 people compared to "optimal" medical therapy in another 1100. You'll recall that no difference was found.

In particular, over approximately 5 years, 20% of participants in each group died, experienced heart attacks, or strokes. Of those treated with "timal" medical therapy, 32% ended up getting a procedure like stents or bypass anyway due to deteriorating symptoms.

What is "optimal" medical therapy? I bring this up again because the study investigators in COURAGE, as well as in similar trials, say this with a straight face. Optimal medical therapy means aspirin and/or Plavix (the anti-platelet, aspirin-like blood thinner); "aggressive" statin drug therapy to reduce LDL cholesterol to 60-85 mg/dl; and "anti-ischemic" therapy (that reduces angina and the phenomena of poor coronary blood flow) using nitroglycerin preparations, beta blockers, and other drugs.

I do give credit to the investigators for having the courage to perform this trial in a world hell bent on doing procedures and still reporting the neutral outcome. But the notion of "optimal" medical therapy begs for comment.

Indeed, this is regarded as optimal by most practitioners. Some would even argue excessive, based on the low LDL target achieved. Would you be satisfied with a 20% likelihood of heart attack, stroke, or death or 5 years, a 1 in 5 roll of the dice? I would not. Recall that we aim for near-total elimination of risk.

What could have been further "optimized"? Plenty. For instance:

--What is the real LDL, not the fabricated, calculated LDL? The two can be commonly 100 mg/dl different.

--How about raising HDL to 60 mgd/?

--What about reducing the proportion of small LDL particles? After all, small LDL is the number one cause of heart disease in the U.S., not high LDL.

--What is Lp(a)? If you treat LDL with a statin drug, Lp(a) is unaffected and continues to trigger huge plaque growth. You will fail if this is not identified and corrected.

--What is vitamin D3? One of the most powerful facilitators of plaque reversal I know of.

--What are triglycerides? Triglycerides create hidden particles in the blood like intermediate-density lipoprotein, potent triggers for coronary plaque growth. Speaking of intermediate-density lipoprotein, that's another very important pattern to identify, the after-eating persistence of dietary fats.

--Why aren't they taking fish oil? With a 28% reduction in heart attack and 45% reduction in sudden death from heart attack, this alone would have halved the number of "events" in the "optimal" medical treatment group.

Of course, there's more. But the idea that aspirin, statins, and anti-ischemic therapy is somehow optimal is silly and sad at the same time. But that's the bias. The COURAGE Trial does represent a step forward, a step away from the "stent everyone and everything" mentality that motivates my colleagues, aided and abetted by their co-conspirators, the hospitals. But you and I know better. "Optimal" medical therapy, in truth, can mean a far better approach that can dramatically reduce, perhaps eliminate, risks for events like heart attack. The conventional "optimal" medical therapy will suffice only if you're content with a 20% likelihood of heart attack, death or stroke, or a 32% likelihood of an urgent procedure in your future.

Niacin, postprandial patterns

For a detailed report on the very important postprandial (after eating) patterns that contribute hugely to heart disease risk, read my recent article in Life Extension Magazine, available (no cost) at:

Uncovering a Hidden Source of Cardiovascular Disease Risk
at http://www.lef.org/magazine/mag2007/mar2007_report_heart_01.htm


For a report on using niacin to reduce risk of heart disease, see another report in the same issue of Life Extension:

Ask the Doctor: Using Niacin to Improve Cardiovascular Health
at
http://www.lef.org/magazine/mag2007/mar2007_atd_01.htm.

Also, keep your eyes open for a lengthy report focused exclusively on the Track Your Plaque program in an upcoming issue of Life Extension. I'll provide links in this Blog when it comes out.

What's better than fish oil?

One of the recent questions on our Track Your Plaque Forum related to what to do about a triglyceride level of 101 mg/dl while on fish oil.

Recall that, contary to conventional thinking like that articulated in the ATP-III cholesterol treatment guidelines, we aim to reduce triglycerides to 60 mg/dl or less. This is important to suppress the formation of abnormal triglyceride-containing lipoprotein particles, especially small LDL, reduced HDL, lack of healthy large HDL, VLDL. ATP-III advises a level of 150 mg/dl or less. Unfortunately, triglyceride levels this high guarantee appearance of all these undesirable particles and an increasing heart scan score.

What's better than 4000 mg of fish oil for its 1200 mg of EPA and DHA (omega-3 fatty acids)? More fish oil. In other words, the 4000 mg fish oil providing 1200 mg EPA + DHA is our minimum. A simple increase to 6000 mg to provide 1800 mg EPA + DHA is usually all that is necessary to reduce triglycerides and put a halt to the cascade of abnormal lipoprotein particles that trigger plaque growth. Occasionally, a somewhat higher dose may be required. Doses are best divided into two, with meals (e.g., three capsules twice a day).

Another important issue: An over-reliance on wheat products can also increase triglycerides. This includes any flour product like breads (regardless of whether it's white, whole wheat, or whole grain--they all raise triglycerides), pretzels, bagels, breakfast cereals, and pasta. A dramatic reduction in wheat-containing products will reduce triglycerides substantially, help you reduce your abdominal fat, reduce blood pressure, raise HDL and reduce small LDL, clear your mind, provide more energy, avoid afternoon "fogginess" . . . Huge benefits.

Valve disease and vitamin D

There are two common forms of heart valve disease: aortic valve stenosis (stiffness) and insufficiency (leakiness), and mitral anular calcification.

Both valve issues are regarded as evidence of senescence, or aging--the older you are, the more likely you will have one or both. Both conditions involve progressive calcium deposition and, to some degree, cholesterol deposition. They might be regarded as phenomena of "wear and tear" just like hip arthritis.

There are no known therapies to stall or stop the development of mitral anular calcification. However, several attempts have been made over the years to identify treatments that can slow or stop the progression of aortic valve disease, which is becoming increasingly common and is addressed by surgical valve replacement when severe. The most recent trials have examined whether high-dose Lipitor (80 mg) has any effect (it did not) and high dose Crestor (40 mg), which slowed but did not stop the deterioration of stiff valves.

It's been my suspicion that vitamins D and K2 may play a crucial factor in valve health. After all, vitamin D is the master controller of calcium deposition. Preliminary data also suggest that people who are intentionally made vitamin K deficient with the drug, Coumadin, develop twice the calcium deposition on aortic valves that non-Coumadin takers develop.

I saw a patient Friday, Marianne. In addition to a moderate heart scan score of 379 at age 71, Marianne had a leaky (insufficient) aortic valve. By an echocardiogram 18 months ago, the valve was moderately leaky. I put Marianne on vitamin D, 4000 units, to raise her blood level to 50 ng/ml.

Last week, I asked Marianne to have another echocardiogram. This time, no leakiness whatsoever--none. I have never seen this happen before. Although Marianne is only one example and we don't want to extrapolate too far from the experience of one person, it's hard not to attribute this phenomenal response to vitamin D supplementation.

I wonder what would have happened if we had added vitamin K2, as well?

Anyway, just another potential wonderful effect of vitamin D restoration.
Blame the niacin

Blame the niacin

Despite the fact that niacin is:

1) A vitamin--vitamin B3

2) One of the oldest cholesterol-reducing agents around with a long-standing track record of effectiveness and safety

3) Available as a prescription drug as well as a variety of "nutritional supplements"

most physicians remains shockingly unaware of its benefits, effects, and side-effects. Most, in fact, are either ignorant or frightened of advising their patients on niacin use. As a result, I commonly have to tell my patients to resume the niacin that their primary care physician has (wrongly) stopped because of itchy feet, grumpiness, groin rash, urinary tract infections, nightmares, diarrhea, hair loss, runny nose, etc. All of these are REAL reasons doctors have advised patients to stop niacin (though none were actually due to niacin).

Is niacin really that troublesome? No, it's not. In fact, if used properly, it's among the most effective and safe tools available for correction of low HDL, small LDL and other triglyceride-containing lipoproteins, lipoprotein(a), and dramatic reduction of heart attack risk. If added to a statin agent, the heart attack risk reduction can approach 90%.

Statins are just too easy for doctors to prescribe. Niacin, on the other hand, requires a good 15-20 minutes to describe how to use it. It could generate an occasional phone call from a patient who struggles with the annoying but largely harmless and temporary "hot-flush" feeling, a lot like a hot blush. Given a choice, most doctors would simply choose not to be bothered. For this reason, I'll commonly see many, many people with uncorrected low HDLs and other patterns.

Have a serious discussion and press for confident answers if you find your doctor reflexively telling you that the wart on your thumb should be blamed on niacin.

Here are the steps we advise that really make taking niacin easy and tolerable:

1) Take with dinner.

2) Take with 2 extra glasses of water. If you experience the hot-flush later on, drink an additional 2 8-12 oz glasses of water i.e., a total of 16-24 oz). Extra hydration is extremely effective for blocking the hot-flush.

3) Take a 325 mg, uncoated aspirin. This is only necessary in the beginning or with any increase in dose, rarely chronically for any length of time.


This is not to say that there aren't occasional people who are truly and genuinely intolerant to niacin. It does happen. But those people are a small minority, less than 5% of people in my experience. Niacin is far more effective and safe than most physicians would have you believe.

Comments (7) -

  • madcook

    10/31/2006 6:12:00 AM |

    I've taken prescription Niaspan for over an year and a half.  Several times I've had an unintended "untoward" reaction, more than a blush, more than a flush... more like a niacin storm!  Each time I've learned something new, however.  Yes, hydration is very important.  There are certain foods and drugs which apparently dam up the same metabolic pathway as niacin, and can cause a pretty nasty reaction.  Among these, at least for me, are certain long acting antibiotics (Zithromax), spicy chai tea, pepperoni (not supposed to go there anyway!) and very spicy foods, if taken near the time of Niaspan dosing.  I was advised by my Dr. that Benadryl syrup would help to shorten the duration of the "storm".  Mostly it's a case of dietary management and timing of dosage.  The good done by niacin certainly still outweighs the occasional bad side effects!

  • Jim

    3/14/2008 4:03:00 PM |

    Another comment about niacin from this long-time niacin user, maybe folks will find it useful...
    Dr. Davis's advice to hydrate heavily to prevent/reduce flushing is, alas, not completely effective. One can easily prove this for oneself. The next time you experience a big flush, consume as much water as you are able, and see if the flush quickly resides..does it?  No. Hydration is certainly great advice, I'm not knocking it, but as a flush reduction strategy, it isn't enough. One commentor here mentioned quercetin.  It seems some recent research on certain flavonoids (quercetin, luteolin) have produced good results,better than aspirin, which was mentioned in this thread.  One needs to experiment and see if supplements such as these do help, taken maybe 30-45 minutes before the niacin dose. I have some other comments on niacin strategies I've hardly seen mentioned anywhere, but I'll wait until (1) I see my posts are approved (I'm new here), and (2) that people are interested. Let's see if there is any feedback. Regards, Jim

  • mill

    6/27/2008 5:43:00 PM |

    I've been taking niacin  2 times daily for 6 months and dropped my cholestral from 240 to 162.  Can I go back to once daily?

  • Anonymous

    12/30/2008 10:15:00 PM |

    I have seen some research papers that report that NIACIN, Nicotinamide and/or SAMe ( maybe also other methyl donors such as TMG ) can cause Parkinson's disease. I wonder if niacin can be converted to Nicotinamide in the body. Please see their abstracts and URLs below. Thank you.



    Niacin Metabolism and Parkinson’s Disease

    Tetsuhito FUKUSHIMA1)
    1) Department of Hygiene & Preventive Medicine, Fukushima Medical University School of Medicine
    Abstract
    Epidemiological surveys suggest an important role for niacin in the causes of Parkinson’s disease, in that niacin deficiency, the nutritional condition that causes pellagra, appears to protect against Parkinson’s disease. Absorbed niacin is used in the synthesis of nicotinamide adenine dinucleotide (NAD) in the body, and in the metabolic process NAD releases nicotinamide by poly(ADP-ribosyl)ation, the activation of which has been reported to mediate 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine-induced Parkinson’s disease. Recently nicotinamide N-methyltransferase (EC2.1.1.1) activity has been discovered in the human brain, and the released nicotinamide may be methylated to 1-methylnicotinamide (MNA), via this enzyme, in the brain. A deficiency in mitochondrial NADH:ubiquinone oxidoreductase (complex I) activity is believed to be a critical factor in the development of Parkinson’s disease. MNA has been found to destroy several subunits of cerebral complex I, leading to the suggestion that MNA is concerned in the pathogenesis of Parkinson’s disease. Based on these findings, it is hypothesized that niacin is a causal substance in the development of Parkinson’s disease through the following processes: NAD produced from niacin releases nicotinamide via poly(ADP-ribosyl)ation, activated by the hydroxyl radical. Released excess nicotinamide is methylated to MNA in the cytoplasm, and superoxides formed by MNA via complex I destroy complex I subunits directly, or indirectly via mitochondrial DNA damage. Hereditary or environmental factors may cause acceleration of this cycle, resulting in neuronal death.

    Key words:
    nicotinamide N-methyltransferase, 1-methylnicotinamide, poly(ADP-ribosyl)ation, mitochondria, complex I

    Pasted from http://www.jstage.jst.go.jp/article/ehpm/10/1/10_3/_article


    Parkinson's disease: the first common neurological disease due to auto-intoxication?
    A.C. Williams1, L.S. Cartwright2 and D.B. Ramsden2
    From the Divisions of 1Neurosciences and 2Medical Sciences, University of Birmingham, Birmingham, UK
     
    Parkinson's disease may be a disease of autointoxication. N-methylated pyridines (e.g. MPP+) are well-established dopaminergic toxins, and the xenobiotic enzyme nicotinamide N-methyltransferase (NNMT) can convert pyridines such as 4-phenylpyridine into MPP+, using S-adenosyl methionine (SAM) as the methyl donor. NNMT has recently been shown to be present in the human brain, a necessity for neurotoxicity, because charged compounds cannot cross the blood-brain barrier. Moreover, it is present in increased concentration in parkinsonian brain. This increase may be part genetic predisposition, and part induction, by excessive exposure to its substrates (particularly nicotinamide) or stress. Elevated enzymic activity would increase MPP+-like compounds such as N-methyl nicotinamide at the same time as decreasing intraneuronal nicotinamide, a neuroprotectant at several levels, creating multiple hits, because Complex 1 would be poisoned and be starved of its major substrate NADH. Developing xenobiotic enzyme inhibitors of NNMT for individuals, or dietary modification for the whole population, could be an important change in thinking on primary and secondary prevention.


    Pasted from http://qjmed.oxfordjournals.org/cgi/content/full/98/3/215

    see also
    http://www.springerlink.com/content/d5wurtwylvpcy04q/


    But,on the contrary,the paper below seems to suggest that niacin protects from Parkinson's.

    Title: Does diet protect against Parkinson's disease? Part 4 – vitamins and minerals
    Author(s): Isabella Brown
    Journal: Nutrition & Food Science
    ISSN: 0034-6659
    Year: 2004 Volume: 34 Issue: 5 Page: 198 - 203
    DOI: 10.1108/00346650410560343
    Publisher: Emerald Group Publishing Limited
    Abstract: This paper is the fourth in a series on Parkinson's disease and diet and investigates the role which antioxidant vitamins A and C, niacin and selenium may have on the incidence of the disease. Oxidative stress is believed to be a key factor in the development of PD and all of these have a role in preventing oxidative stress mediated cell damage. Dietary information was obtained via questionnaires. Vitamin C was found to reduce the risk of PD by 40 per cent in one study, although this was not supported by other studies. Niacin was associated with an at least 70 per cent reduced risk of PD incidence in a number of studies. No evidence was found to support a role for vitamin A or selenium. There is a need for further research to support or disprove the roles of these antioxidant vitamins within the aetiology of PD.
    Keywords: Diet, Diseases, Lifestyles, Vitamins
    Article Type: Research paper
    Article URL: http://www.emeraldinsight.com/10.1108/00346650410560343

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    Have a serious discussion and press for confident answers if you find your doctor reflexively telling you that the wart on your thumb should be blamed on niacin.

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