GNC Still Selling DMAA; Lawmakers Launch Inquiry

Energy & Commerce Subcommittee on Oversight and Investigations leaders ask GNC, USPlabs and FDA about the safety and history of use of DMAA. GNC says it does not manufacture products that include DMAA, but plans to sell through its inventory of USPlabs’ Jack3d.

House Energy & Commerce Committee members are questioning FDA, [GNC Holdings Inc.]and sports nutrition manufacturer USPlabs LLC over the continued sale of DMAA dietary supplements.

In a May 8 letter to FDA Commissioner Margaret Hamburg, the lawmakers cite the agency’s earlier warning letters...