White German Model Reveals "Transition" to Identifying as Black on "The Maury Show" Allure Melanotan 2 doesn't just stimulate melanin in your skin, but your hair follicles aswell .. my beard is about 80% darker today, than a month before I started taking melanotan. Guys with PT 141 Side Effects: What You Need to Know Before Starting Your body already makes a hormone that tells your skin to tan. Melanotan 2 is a synthetic peptide engineered to mimic that hormone but in a version that's more potent and longer lasting than Melanotan II for Radiant Skin Dr. Joerg Schuller