Melanotan II and NAD+ Stack: Summer Tanning Experiment Melanotan Tanning Peptides: Safe Use, Side Effects & How It Works Scientifically 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 Melanotan II is a peptide that supports melanin production meaning your glow can start from the inside out (without living out in the sun or tanning beds). Our WCC nurses