References & further readingPrimary sources cited on this page
Melanotan II (MT-II) is a synthetic cyclic heptapeptide analogue of α-melanocyte-stimulating hormone (α-MSH), first synthesised at the University of Arizona by Hruby and colleagues in the 1980s. It acts as a non-selective agonist at melanocortin receptors MC1R, MC3R, MC4R and MC5R. The UK Medicines and Healthcare products Regulatory Agency has repeatedly warned that unlicensed melanotan products are not authorised for human use.
Regulatory & compliance notice
This product is supplied strictly for in-vitro laboratory research. Melanotan II is not licensed as a medicine in the United Kingdom. The MHRA has explicitly warned the public not to buy or use unlicensed tanning injections. Nothing on this page constitutes medical advice.
External links point to primary literature or regulatory records and open in a new tab. Citations are provided so the reader can independently verify every factual claim made on this page. Last reviewed 22 July 2026.