Health Check: why does hair change colour and turn grey? : Find an Expert : The University of Melbourne Melanotan II PERMANENTLY Darkened My Skin! Melanotan medAge Aesthetics & Wellness Tanning Injections: Risks, Side Effects, and Precautions 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 Nitisinone increases melanin in people with albinism National Institutes of Health (NIH)