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Encyclopedia entry · enforcement watch

Melanotan

Melanotan I (afamelanotide, branded Scenesse) and Melanotan II are synthetic analogues of alpha-melanocyte-stimulating hormone (alpha-MSH). Melanotan I has a UK and EU marketing authorisation as Scenesse for erythropoietic protoporphyria, a rare condition. Melanotan II has no marketing authorisation anywhere. Melanotan II is the molecule typically sold as a research peptide for tanning effects, and the MHRA has been actively enforcing against UK consumer-facing sales.

MHRA enforcement context

Why this entry is here

Melanotan II is the highest-enforcement-risk peptide we cover. We include it in the encyclopedia because UK readers searching for it deserve accurate information about the regulatory and safety position. We do not link to retailers from this page. The other research-peptide pages on the site link to retailer comparison; this one deliberately does not.

For erythropoietic protoporphyria specifically, Scenesse (Melanotan I) is the licensed UK route. Speak with a specialist clinician.

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Reviewed by Oliver Mackman, editorial director · last reviewed 2026-05-20