Melanotan II: Tanning injections, nasal sprays harmful to health Imagine just wanting to be jacked and tan and you end up like this? Melanotan II is a peptide that increases the melanin in your skin and can give men a boner that What is melanotan and why is it so dangerous? The Dangers of Melanot*n II Explained Australians who use tanning products containing 'melanotan' are at risk of serious health problems. These products include nasal sprays and other injectable and ingestible tanning products, and are being illegally promoted and Tanning Injections: Risks, Side Effects, and Precautions