"The Case Against Vitamins." an article by the Wall Street
Journal that originally ran on March 20 and is being widely
reprinted, should be thrown out of court, says Neil Levin, a Chicago-
area Certified Clinical Nutritionist.
"The danger here is that a reporter who is neither a nutritionist
nor a doctor may dissuade people from utilizing products which can
help them maintain their health," he said. "And that is harmful."
There is an understandable tendency for the media to embrace
controversial stories in an environment where a single study is
touted as negating all other studies, even though rogue studies are
usually deeply flawed, he said. The "several studies" cited by the
Wall Street Journal have been seriously criticized by experts
without their rebuttals resulting in any real effort to set the
record straight, according to Levin.
Provocative reports get wide coverage, he said, but not the
subsequent, legitimate criticism of the studies. This leads to
public confusion about supplements and fuels a growing mistrust of
the reliability of media reports on all nutrition topics. Levin said
dietary supplements are singled out as being harmful or useless, or
both at once, when these accusations are often not supported by good
data.
"This WSJ article singled out beta-carotene as promoting cancer,
mentioning a study on Finnish smokers. Yet that study's data was
recently reanalyzed, with researchers looking instead at total
antioxidant intake. They discovered that low antioxidant intake was
the real culprit in that original cancer study, not betacarotene
supplementation."
The article also reported that antioxidants may "promote some
cancer and interfere with treatments." The peer-reviewed journal CA
from the American Cancer Society published (online) Levin's analysis
documenting dozens of studies proving that specific vitamins and
antioxidants actually enhanced medical cancer therapies.
Many negative studies state that their results are not applicable
to populations other than the ones studied, yet get wide press
coverage positioned as being universally definitive, according to
Levin. And evidence that the researchers and the Wall Street Journal
admit is "inconclusive" is still publicized as an argument against
taking Vitamin E, which Levin stresses is a safe and effective
nutritional supplement.
"The Vitamin E controversy should have been cleared up after the
American Journal of Clinical Nutrition did a far more thorough
review than the handful of studies used in the Annals of Internal
Medicine review article," Levin said. "Annals has, to its credit,
published dozens of critical comments from physicians and
scientists, including mine. The vastly more authoritative AJCN
report, 'Vitamins E and C Are Safe Across A Broad Range Of Intakes,'
determined that the Annals data indicated problems only in doses
over 2,000 IU; not the 400 IU widely reported. The Food and
Nutrition Board of the Institute of Medicine has set the safe, upper
tolerable intake level for vitamin E at 1,500 lU daily. Research
shows that Vitamin E may be useful for people suffering from
Parkinson's, macular degeneration, cataracts, cancer and mercury
toxicity. The substantial body of evidence supporting supplements
may not sell papers the way controversial studies do, but it is
weighty."
Reports that B-Vitamins don't lower risk for heart attacks miss
the point entirely, according to Levin. Vitamins, he said, do lower
levels of homocysteine, an inflammatory substance, and reduce the
number of non-fatal strokes. Homocysteine as a theoretical cause of
heart disease is being challenged, but the B-Vitamins performed
exactly as predicted.