When it comes to tanning peptides, there are two main options: Melanotan 1 and Melanotan 2. Melanotan 1, also called afamelanotide, is FDA approved for a rare light sensitivity condition and works Melanotan 1 (10 MG) Sigma Compounds Viral 'Barbie drug' for tanning can cause brain swelling and even cancer, experts warn Melanotan 1 vs Melanotan 2: Tanning Peptides Compared Which Is Better? PPW Peptide Protocol Wiki