Melanotan 2 The Revolutionary Way of Achieving a Great Tan by Protein Factory Medium Age related ciliopathy: Obesogenic shortening of melanocortin 4 receptor bearing neuronal primary cilia: Cell Metabolism 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 Been testing out MT 1 peptide (Melanotan I) lately and honestly this stuff works. Originally developed for skin protection and UV resistance, but most people know it now for boosting melanin and giving