To the Editor Illegal and undeclared pharmaceutical ingredients are much too readily available in products that are offered to unsuspecting consumers. This is a worldwide problem, and regulatory agencies in the United States, Canada, Europe, and Asia have identified and acted to curtail such products. (Numerous examples of foreign actions against products that contain undeclared pharmaceutical ingredients can be found at the American Herbal Products Association–maintained website, http://www.keepsupplementsclean.org.)
McGuffin M. Illegally Marketed Drug Ingredients Are Not Dietary Supplements. JAMA Intern Med. 2013;173(22):2090–2091. doi:10.1001/jamainternmed.2013.10417
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