Melanocortin Receptor Agonist

Melanotan I

FDA-approved product existsSkin & hair
6.2/10

BioHarmony verdict

Worth trying

Melanotan I is most defensible for photoprotection in EPP and planned UV exposure, with Langendonk 2015 reporting 69.4 vs 40.8 hours of pain-free sun exposure in the US trial. The wellness case is narrower than the prescription afamelanotide evidence.

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What is Melanotan I?

Melanotan I (Afamelanotide) is a synthetic MC1R-selective alpha-MSH analog with prescription-grade evidence for erythropoietic protoporphyria, where Langendonk reported 69.4 versus 40.8 hours of pain-free sun exposure in the US Phase III arm. Afamelanotide works by increasing eumelanin through MC1R, which explains why the upside is strongest for photoprotection and pigment-related use cases. Melanotan I earns a worth-trying score because regulated SCENESSE has meaningful human evidence and the intrinsic afamelanotide safety profile is manageable with dermatology monitoring.

From the BioHarmony report, reviewed 2026-09-08.

How it is thought to work

MC1R activation increases eumelanin and UV tolerance

Safety watch-outs

  • New or rapidly changing mole, oral pigmentation, or bleeding lesion
  • Severe headache, confusion, vision change, chest pain, or neurologic symptoms
  • Priapism, severe abdominal pain, dark urine, or muscle pain after dosing

Full risk profile in the BioHarmony report.

Dosing as published

Approved labelSCENESSE prescribing information for erythropoietic protoporphyria
PopulationAdults with a history of phototoxic reactions from erythropoietic protoporphyria
DoseOne 16 mg implant
RouteSubcutaneous implant inserted by a trained healthcare professional
FrequencyEvery 2 months
DurationThree implants were administered in the pivotal trials; the approved label controls clinical use
PreparationSterile 16 mg implant supplied for professional subcutaneous insertion; not a vial and not reconstituted.
Source: Dosage and Administration section 2; Dosage Forms and Strengths section 3

More reported protocols

Members

Members can compare additional reported doses, schedules, and preparation notes.

Educator coverage (2)

Attributed viewpoints, separate from primary research.

Trust & sourcing

US approvalFDA-approved product exists
CompoundingAfamelanotide has an approved implant product; other products represented as Melanotan I are not thereby FDA approved
Last checked2026-07-13
Next review2026-10-11

The registry alias Melanotan I maps to afamelanotide. FDA-approved afamelanotide is marketed as Scenesse to increase pain-free light exposure in adults with erythropoietic protoporphyria, not as a general tanning product.

Primary sources

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  4. 6.2/10SNAP-8Worth tryingSkin & hairNot FDA approvedSNAP-8 (acetyl octapeptide-3) is a topical cosmetic peptide sold as a Botox alternative.

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