People on TikTok Are Using Nasal Tanning Sprays. Are They Safe? NBC 6 South Florida Dangerous 'Barbie drug' Melanotan II sparks crackdown on social media influencers ABC 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 Avoid nasal tanning sprays or nasal tanners entirely. These products promise an all over tan without sun exposure but they are unregulated, can be unsafe, and contain potentially risky substances like Melanotan 2.