People on TikTok Are Using Nasal Tanning Sprays. Are They Safe? NBC 6 South Florida 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 You Should Avoid Using Nasal Tanning Sprays Viral 'Barbie drug' for tanning can cause brain swelling and even cancer, experts warn 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. Experts are warning against the viral unregulated nasal tanning spray trend. #news @mayaeaglin