15 Oct 2018 --- Potentially harmful active pharmaceuticals continue to be identified in US over-the-counter (OTC) dietary supplements commonly marketed for sexual enhancement, weight loss or muscle building, according to a study published in JAMA. The researchers analyzed US Food and Drug Administration (FDA) warnings from 2007 through 2016 to show that unapproved pharmaceutical ingredients were identified in 776 dietary supplements. In response, US health bodies and trade associations are calling for consumer caution and reform to ensure supplements are free from pharmaceutical contamination.