Dietary supplements containing banned drugs often remain on sale long after they have been recalled by the Food and Drug Administration (FDA), doctors at Harvard Medical School have found.
The FDA has identified more than 400 supplement brands that contain banned pharmaceutical ingredients, and has issued a recall for 70 percent of them, according to Reuters.
The study involved 27 supplements recalled between 2009 and 2012. They were marketed for sports enhancement, weight loss and sexual enhancement. Two-thirds were manufactured in the United States, the article notes. The researchers purchased the supplements from manufacturer websites at least eight months and up to four years after they were recalled.