Phase I Human Trial: Melanotan II Produces Dose-Dependent Skin Tanning in Healthy Volunteers
The first clinical evaluation of MT-II in humans administered escalating doses to Fitzpatrick skin type I/II volunteers. All participants showed significant, objectively measured pigmentation increases within five days, with tanning observed in both sun-exposed and sun-protected areas — confirming a systemic melanogenic effect. This study established a well-tolerated dose range and, through unexpected observations, triggered the research programme that led to FDA-approved bremelanotide.