Verified July 2026 · Cited to primary sources
Melanotan-2 (MT-2): Evidence Grade D — Animal studies only, unproven in humans.
The honest verdict
Melanotan-2 (MT-2) is an unapproved "tanning" peptide with documented serious harms — melanoma and mole changes, priapism, nausea, blood-pressure changes and rhabdomyolysis have all been reported. Human evidence is Grade D and the safety flag is red. It is not the same as FDA-approved afamelanotide (Scenesse). There is no safe or legal way to buy it, and we do not recommend it.
Melanotan-2 (MT-2) at a glance
- Class
- Synthetic non-selective melanocortin receptor agonist (analog of α-MSH)
- Mechanism
- A non-selective melanocortin-receptor agonist that stimulates melanocytes to produce pigment (tanning), with off-target effects on appetite, sexual arousal and the cardiovascular system because it hits multiple melanocortin receptors.
- Also known as
- MT-2, MT-II, Melanotan II
- Research applications
- Skin tanning / melanogenesis (the marketed use — unapproved)
- Sexual arousal (a secondary, off-target effect — not an approved indication)
- Forms
- subcutaneous injection, nasal spray (unapproved)
- Legal status
- Research-only
- WADA (anti-doping)
- Not explicitly prohibited (no performance mechanism; note WADA's S0 catch-all can capture any non-approved substance)
- Evidence grade
- Grade DAnimal studies only, unproven in humans
How we grade evidence
Every grade is assigned by a fixed A–F rubric — human-trial strength, not hype or affiliate status. Last verified July 6, 2026.
What is Melanotan-2 (MT-2)?
An unapproved "tanning" peptide with documented serious harms — melanoma and mole changes, priapism, nausea, and rhabdomyolysis have all been reported. This is a safety page, not a recommendation.
A non-selective melanocortin-receptor agonist that stimulates melanocytes to produce pigment (tanning), with off-target effects on appetite, sexual arousal and the cardiovascular system because it hits multiple melanocortin receptors.
How strong is the evidence for Melanotan-2 (MT-2)?
Grade D: no FDA approval and no adequate efficacy RCT — only small early studies, sold illegally with documented harms (decision-tree rule 5 fired — no published human efficacy RCT). Do not confuse it with afamelanotide (Melanotan-1 / Scenesse), a different, more receptor-selective peptide that IS FDA-approved (2019) for a rare condition (erythropoietic protoporphyria). Melanotan-2 is not that drug and is not approved for anything.
Primary sources (4)
- FDA Warning Letter (Melanocorp, Inc.) — Melanotan II marketed as an unapproved new drug for injectable tanning
- Changes in Oral Mucosa Associated with Melanotan II Injections: A Case Report (PMC) — documented pigmentary/systemic effects
- FDA 503A bulks list (Melanotan II removed from Category 2; no legal compounding route)
- Afamelanotide (SCENESSE) — the FDA-APPROVED, distinct MC1R-selective peptide, for comparison
Is Melanotan-2 (MT-2) legal? (Status July 2026)
No legal supervised US route.
What does Melanotan-2 (MT-2) cost — and how do you access it legally?
Typical cost
UNKNOWN
Not quoted on purpose. Melanotan-2 is sold only through illegal/gray channels, it is an unapproved new drug, and it carries a red safety flag — there is no legitimate price to cite and no source we would link.
No legal supervised access route right now.
Melanotan-2 (MT-2) has no compliant US route today. Vials sold "for research use only" are a gray-market fig-leaf, not a legal loophole — we don't link them. If you pursue Melanotan-2 (MT-2), do it with a licensed clinician, and re-check its legal status first.
Is Melanotan-2 (MT-2)safe? Side effects & risks
This is the important honest safety warning. Documented harms from Melanotan-2 use include new and changing (atypical) moles and melanoma, priapism (persistent painful erection that can cause permanent damage), nausea and vomiting, flushing, blood-pressure and heart-rate changes, and reports of rhabdomyolysis and acute kidney injury. Sourcing is unregulated and mislabeled — independent testing has found vials contain far less peptide than labeled plus unknown impurities. The FDA has issued warning letters against its sale as an unapproved new drug. There is no safe or legal supervised US route. We do not provide dosing and do not link any source.
Medical disclaimer: This page is independent editorial information, not medical advice, and Best Peptide For That is not a medical provider. We do not provide dosing. Talk to a licensed clinician before starting, stopping, or changing any peptide or medication. Full medical disclaimer.
FAQ
Melanotan-2 (MT-2) FAQ
Is Melanotan-2 safe?
No — this is the one to take seriously. Reported harms include new and changing moles and melanoma, priapism (a persistent, painful erection that can permanently damage the penis), nausea and vomiting, blood-pressure and heart-rate changes, and even rhabdomyolysis with kidney injury. On top of that, vials are unregulated and frequently mislabeled or contaminated. We flag Melanotan-2 red and do not recommend it.
Is Melanotan-2 FDA approved?
No. Melanotan-2 is not FDA-approved for anything, and the FDA has issued warning letters against selling it as an unapproved new drug. Don't confuse it with afamelanotide (Melanotan-1 / Scenesse), which is a different, more receptor-selective peptide that IS FDA-approved — but only for a rare light-sensitivity disorder (erythropoietic protoporphyria), not for cosmetic tanning.
What is the difference between Melanotan-1 and Melanotan-2?
Melanotan-1 (afamelanotide, brand Scenesse) is a more MC1R-selective peptide that is FDA-approved for erythropoietic protoporphyria and has a narrower side-effect profile. Melanotan-2 is a shorter, non-selective peptide that hits multiple melanocortin receptors — which is why it also causes appetite, sexual and cardiovascular effects — and it is unapproved and sold illegally.
Can I buy Melanotan-2 legally?
No. Melanotan-2 is an unapproved new drug with no legal supervised US route; it was removed from the 503A Category 2 list and is sold only through illegal, unregulated channels. Given the documented safety risks and mislabeling, we do not quote a price or link any source.
Keep reading
Tesamorelin
One of only two FDA-approved peptides in this space — proven to cut visceral fat, but approved for a narrow HIV indication.
Grade APT-141
One of only two FDA-approved peptides in this space — proven to raise sexual desire in premenopausal women, but the benefit is modest and the off-label hype outruns it.
Grade BSermorelin
The "gentler," formerly-FDA-approved GH-axis peptide — the best-evidenced option you can still legally get through a compounding pharmacy.
The monthly peptide evidence brief.
What the research and the FDA actually say — one short email a month. Unsubscribe anytime.
No spam. We never sell your email. Editorial policy.