Melanotan II
Where tanning research wandered: Illumine Med Spa
A tan seems such a tidy ambition. The research behind it sent me in several directions, and the tidy version now bores me.
Three volunteers in a tanning study
In a 1996 pilot study of Melanotan II, 3 healthy male volunteers entered a pigmentation experiment. Facial, upper-body and buttock pigmentation increased in 2 of the 3 after 5 low doses, without ultraviolet exposure. The same paper recorded spontaneous erections lasting 1–5 hours and mild nausea. That is quite a lot of biology for a paper about a tan.
I opened it expecting colour to be the interesting result. The erections redirected my curiosity. An effect that might be a nuisance in a pigmentation experiment could become the reason for another experiment altogether. The subsequent placebo-controlled study in men with psychogenic erectile dysfunction did exactly that: it investigated erections.
Illumine suggests bringing something into view. Here, the visible colour is the beginning of the puzzle. A molecule that escaped its cosmetic description is a subject I can get excited about.
Melanocortin research
The historical account of melanocortin therapeutics describes Melanotan II as a non-selective agonist: it activates multiple members of a receptor family. That breadth helps explain why the research sprawls. Calling it a tanning peptide feels oddly incurious to me once its other effects enter the picture.
The trail reaches food motivation in male mice, a chemically related sexual-function candidate called PT-141, and reports of changing moles and other harms. Those are different branches, with different questions. I enjoy the unexpected connections; enthusiasm for the connections still leaves the risks intact.
Continue along a branch
The pigmentation trial starts with the actual colour result and the original ambition behind it. The sexual-function detour follows an incidental finding into a deliberately different experiment.
In the appetite experiments, the setting changes to animal research and the question becomes surprisingly specific: eating less, working less for food, or avoiding a taste? The skin and safety record returns to the consequences that a pleasing colour can obscure. The reading list brings the publications together.