From recent studies, it appears that
many dietary supplement manufacturers that have recalls made because
of contaminated products, thumb their nose at the FDA and continue to
sell the product. How bad is it? A study published in the October
22/29 issue of JAMA found that about two-thirds of FDA recalled
dietary supplements analyzed, still contained banned drugs 6 months
after being recalled. It is sad that this study has to be behind a
pay wall.
The U.S. Food and Drug Administration
(FDA) initiates class I drug recalls when products have the
possibility of causing serious adverse health consequences or death.
The FDA has used class I drug recalls in an effort to remove dietary
supplements adulterated with pharmaceutical ingredients from U.S.
markets. Research has found that even after FDA recalls, dietary
supplements remain available on store shelves. However, it has not
been known if the supplements on sale after FDA recalls are free of
the adulterants, according to background information in the article.
Pieter A. Cohen, M.D., of Harvard
Medical School, Boston, and colleagues conducted a study to determine
if banned drugs were still present in dietary supplements purchased
at least six months after a recall. Twenty-seven of the 274 FDA
recalled supplements (9.9 percent) met inclusion criteria for the
study. These supplements were analyzed using the same methods at the
FDA’s laboratories (e.g., gas chromatography/mass spectrometry).
Supplements were purchased an average of 34.3 months (range 8-52
months) after the FDA recall. Seventy-four percent of supplements
(20 of the 27) were produced by U.S. manufacturers.
The researchers found that one or more
pharmaceutical adulterant was identified in 66.7 percent of recalled
supplements still available for purchase (18 of the 27). Supplements
remained adulterated in 85 percent (11 of 13) of those for sports
enhancement, 67 percent (6 of 9) for weight loss, and 20 percent (1
of 5) for sexual enhancement. Of the subset of supplements produced
by U.S. manufacturers, 65 percent (13 of the 20) remained adulterated
with banned ingredients.
Sixty-three percent of analyzed
supplements contained the same adulterant identified by the FDA. Six
(22.2 percent) supplements contained 1 or more additional banned
ingredients not identified by the FDA. Some supplements contained
both the previously identified adulterant as well as additional
pharmaceutical ingredients.
“To our knowledge, this is the
first study to determine if adulterants remain in supplements sold
after FDA recalls,” the authors write. “Action by the FDA has
not been completely effective in eliminating all potentially
dangerous adulterated supplements from the U.S. marketplace. More
aggressive enforcement of the law, changes to the law to increase the
FDA's enforcement powers, or both will be required if sales of these
products are to be prevented in the future.”