Melanotan peptide might seem like the cool thing to doit makes you look tan., But these unregulated injections come with real risks., They can cause unpredictable skin changes, including darkening of Another incredible Peptide experience. I started injecting MELANOTAN 2, 3 weeks ago. The concept is to inject this peptide and then go in the sun and build up a better melanin skin Melanotan II: Tanning injections, nasal sprays harmful to health Melanotan II A Sun Kissed Look, and a Confident You.