Melanotan 2 is not an approved drug anywhere — here is what the regulators and the studies actually say.

Start here

Most of what's online about Melanotan 2 is a sales page. This isn't one. Melanotan 2 (also written MT-2, MT-II, or melanotan ii) is a lab-made peptide that switches on the body's pigment system, so the skin tans with little or no sun. People also report it cutting appetite and, in men, causing spontaneous erections. Here's the blunt part: no medicines regulator anywhere has approved it for any use. Health agencies in the US, UK, Australia, and Ireland have all warned people away from it. The version sold online is an unregulated 'research chemical' — nobody checks what's actually in the vial. The published research is real but thin: a 3-person tanning pilot, a small erectile-function study, animal work, and a stack of case reports describing harms like changing moles, kidney injury, and prolonged painful erections. We summarize the studies, name the regulators, and link every source. What people actually report — the upsides and the ugly bits — sits on the effects page.

Not approved. Anywhere. Full stop.

Melanotan 2 holds no approved indication in any jurisdiction — not the FDA, not the EMA, not Australia's TGA, not the UK's MHRA ^[1][2]. It never finished a Phase II or Phase III trial ^[1]. The only controlled human data come from tiny early studies: a single-blind tanning pilot in three men ^[3] and a placebo-controlled crossover in ten men with erectile dysfunction ^[4]. That's the entire controlled human record.

Don't confuse it with the melanocortin drugs that did get approved. A linear cousin, afamelanotide (sometimes called Melanotan I), is an approved implant for the rare light-sensitivity disorder erythropoietic protoporphyria ^[5]. A separate spin-off, bremelanotide, is approved for a sexual-desire disorder in premenopausal women ^[6]. Neither approval covers Melanotan 2. They are different compounds with their own trial data. Melanotan 2 is the unapproved one.

What the studies actually measured

Strip away the marketing and the real findings are specific and small. In the 1996 tanning pilot, two of three men developed measurable skin darkening after only five low subcutaneous doses, with no UV exposure — alongside spontaneous erections lasting one to five hours and mild nausea ^[3]. In the 1998 erectile-dysfunction crossover, eight of ten men got clinically apparent erections, with mean rigidity time of 38 minutes on the peptide versus 3 minutes on placebo ^[4].

The rest is mostly animal work and chemistry. In mice, the peptide microinjected into a brain reward region cut food intake and food motivation without making the animals sick ^[7]. Older lab papers worked out how to detect and measure it ^[8]. The honest summary: the direction of the effects is well established; the human safety picture is built from case reports, not trials. The full mechanism and study list lives on the Melanotan 2 research page.

The receipts on harm

Regulators didn't warn against Melanotan 2 for fun. The case-report literature is where the cost shows up: renal infarction (a blocked blood supply to the kidney) most likely caused by the peptide ^[9]; documented rhabdomyolysis (severe muscle breakdown) with kidney failure; priapism (a prolonged, painful erection that's a medical emergency); and repeated reports of new, darkening, or atypical moles — plus a handful of melanoma cases in users ^[10].

The supply problem makes all of it worse. Forensic analyses of products bought online repeatedly find mislabeling, wrong doses, and impurities ^[11]. A buyer cannot know what's in the vial. Because it's an unapproved substance with body-altering effects, it also sits in WADA's S0 category — prohibited in sport at all times ^[1]. The plain-English account of melanotan 2 dangers and the is melanotan 2 safe review go deeper, with every claim cited.