Melanotan I And II: Guide : The Tanning Peptides Melanotan 1 and Melanotan 2 are peptides that boost melanin to darken your skin without the sun. Melanotan 1 is FDA approved for rare light sensitivity conditions and gives a more gradual and even tan Melanotan II Wikipedia Melanotan II reverses memory impairment induced by a short term HF diet ScienceDirect The Melanocortin System: A Promising Target for the Development of New Antidepressant Drugs