Everything You Need to Know About the FDA Peptide Ban GHK CU 50mg Vial Copper Peptide Pure Bio Labs 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 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