Injectable Peptides: Out of the Back Alley and Into the Light? Berkley Lifesciences 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 Analysis: The peptide problem: Hype is outrunning the evidence McMaster News More Americans are injecting themselves with peptides