FDA to weigh easing limits on unproven peptides What are peptides? The treatments promising weight loss and better skin, explained Vox The FDA is reviewing 12 peptides for removal from its restricted listincluding BPC 157, TB 500, Semax, and GHK Cu. If it goes through, it's the biggest peptide policy shift in years. More access. Easier Unapproved peptides are now being sold by the world's largest online retailers, despite many appearing on the WADA Prohibited List and not legal for human consumption. Products like BPC 157, AOD 9604, The peptide problem: Hype is outrunning the evidence