Avoid nasal tanning sprays or nasal tanners entirely. These products can produce nasty side effects, such as nausea and vomiting, high blood pressure, respiratory issues, and even links to skin cancer. Nasal 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 Changes in Oral Mucosa Associated with Melanotan II Injections: A Case Report Direct Action of Leptin and Melanotan II on Melanocortin 4 Receptors in Download Scientific Diagram Viral 'Barbie drug' for tanning can cause brain swelling and even cancer, experts warn