 This is Washington's news, traffic, and weather station, WTOP. WTOP News. 652, do you take vitamins and supplements? There are some things you ought to look out for. Consumer man Herb Weisbaum, a contributing editor at Checkbook.org, with more. Are you even getting what's promised? With no pre-marketing quality testing required, manufacturers can replace an expensive ingredient with a cheaper alternative or add a banned drug without disclosing it.