Melanotan II reverses memory impairment induced by a short term HF diet ScienceDirect Melanotan is not a tan. It's an unregulated peptide with real risk. As a dermatologist, here's the reality: It has been linked to new and changing moles including cases of Melanotan What It Is and Its Relation to Skin Cancer Peptides for tanning do exist. Melanotan 1 and Melanotan 2 both work at increasing melanin in the skin. Melanotan 1 takes longer to activate. Melnotan 1 is FDA approved. Melanotan 2 does libido, The Dangers of Melanot*n II Explained Melanotan II (Tan Jabs): Why They're Not Worth The Risk