5 days progress. I've been taking 250mcg of Melanotan II and tanning for 10m outside daily. It's working Tighter in the hamstrings, glutes are still holding all of my fat so How Long Does It Take For Melanotan To Work? Seven Days Of Melanotan 2 Only about 4 hours of sun exposure this week. I feel as though my face has gotten the best results so far. Hoping the sun actually comes Avoid nasal tanning sprays or nasal tanners entirely. These products promise an all over tan without sun exposure but they are unregulated, can be unsafe, and contain potentially risky substances like Melanotan 2. Melanotan 2 Vials: Premium Tanning Peptide for Glow