Melanotan 2: The Path to a Bronze Tan, a Leaner Physique, and Enhanced Libido PARTICLE, s. r. o. MD breaking down Melanotan II Part 2 of my peptide series. The research, the risks, the reality. Long term safety data? Nonexistent. 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 pigment with Comparing Melanotan 1 and Melanotan 2 Peptides Core Peptides Melanotan Tanning Peptides: Safe Use, Side Effects & How It Works Scientifically