Melanotan II vs Melanotan I
Melanotan II is mainly studied for pigmentation, libido. while Melanotan I is studied for pigmentation, skin tone. The difference is in the mechanism and the evidence, not in which is "better": it depends on the goal.
| Melanotan II | Melanotan I | |
|---|---|---|
| Category | Hormonal/Sexual | Aesthetic |
| Studied for | Pigmentation, libido. | Pigmentation, skin tone. |
| How it acts | A peptide studied for its relationship with melanocortin pathways, associated with skin pigmentation and desire response. | A melanocyte-stimulating hormone analog; studied for its relationship with skin pigmentation via melanocortin receptors. |
| Evidence level | Human trials available | Limited human evidence |
How they differ
Although sometimes mentioned together, Melanotan II and Melanotan I do not target the same thing. Melanotan II: A peptide studied for its relationship with melanocortin pathways, associated with skin pigmentation and desire response. Melanotan I: A melanocyte-stimulating hormone analog; studied for its relationship with skin pigmentation via melanocortin receptors.
See full entry: Melanotan II → · See full entry: Melanotan I →
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What is the main difference between Melanotan II and Melanotan I?
Melanotan II targets pigmentation, libido. and Melanotan I targets pigmentation, skin tone. They act through different pathways, so the choice depends on your goal, not on which is "stronger".
Can they be studied together?
Combinations are studied by goal in the literature, but combining is not just adding: it changes the safety profile. What to combine and how is decided with a professional; here we only explain what each is studied for.
Which has more human evidence?
Based on the references we verified, Melanotan II has more human studies of this pair. Each one's evidence level is in the table above, and the references with their PMID are at the end.
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References
Every entry links to its record on PubMed, the US National Library of Medicine database. Open them and check. We would rather have a reader who verifies than one who takes our word for it.
- Melanotan-associated melanoma.human Br J Dermatol · 2011 · PMID 21564053 →
- Eruptive melanocytic naevi following melanotan injection.human Br J Dermatol · 2009 · PMID 19575725 →
- Eruptive naevi and darkening of pre-existing naevi 24 h after a single mono-dose injection of melanotan II.human Eur J Dermatol · 2014 · PMID 24334249 →
- alpha-Melanocyte-stimulating hormone-induced eruptive nevi.human Arch Dermatol · 2009 · PMID 19380666 →
- Afamelanotide for Erythropoietic Protoporphyria.human N Engl J Med · 2015 · PMID 26132941 →
- Afamelanotide: A Review in Erythropoietic Protoporphyria.review Am J Clin Dermatol · 2016 · PMID 26979527 →
- Afamelanotide for prevention of phototoxicity in erythropoietic protoporphyria.review Expert Rev Clin Pharmacol · 2021 · PMID 33507118 →
- Afamelanotide, an agonistic analog of α-melanocyte-stimulating hormone, in dermal phototoxicity of erythropoietic protoporphyria.review Expert Opin Investig Drugs · 2010 · PMID 21073357 →
Educational content. It does not include doses, protocols or preparation: that is defined by a professional.