What is a nasal tanning spray? How does it work? It acts on the pituitary goand in your brian to mimic sun exposure! Stimulating melanocytes, increases the risk of a melanoma, but there are other Reacting to TikTok Melanotan Nasal Spray Challenge Dangerous' tanning products promoted by influencers BBC News 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