There are two peptides people talk about for tanning: Melanotan 1 and Melanotan 2. Melanotan 1 works slower and mainly targets the skin, leading to a more gradual and even increase in Maintaining Tan with Melanotan 1: Dosage, Results, and Differences from Melanotan 2 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 MELANOTAN 1 (10mg) stimulation of melanin synthesis.