
Melanotan I (afamelanotide) is a synthetic analog of α-MSH studied for its selective activity at the MC1 receptor and its role in melanogenesis and photoprotective pathways. Compared with Melanotan II it is more receptor-selective, with studies focused on pigmentation response rather than broader melanocortin activity.
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Suggested protocols typically involve 250–500mcg per administration. Reconstitute with bacteriostatic water and protect from light.