Not all products sold at GNC are safe, and examples of unsafe products found in GNC stores include Jack3d, OxyElite Pro and Craze. In 2013, WTAE Pittsburgh reports that GNC voluntarily destroyed 1,542 cases of products that were deemed to be possibly unsafe.
Jack3d contains dimethylamylamine, or DMAA, which is a product similar to methamphetamine. According to the New York Times, this product may have been involved in the death of an otherwise healthy 22-year-old Army private in 2011.
OxyElite Pro also contains DMAA and has been tied to acute hepatitis, according to Boston Magazine. Unlabeled methamphetamine was also found in Craze, a pre-workout supplement sold at GNC.
In 2013, GNC destroyed $500,000 worth of OxyElite Pro and Jack3d voluntarily because of concerns expressed about the products' safety, according to WTAE Pittsburgh. Supplements such as Jack3d and OxyElite Pro are not regulated by the U.S. Food and Drug Administration.