MT2
Melanotan II (MT2) is a melanocortin. Melanocortins (MCs) are a family of multifunctional peptidergic hormones. MT2 is an analog of these and plays a role in the tanning process but will vary between skin types with its use. It is not really used in any growth as HGH or igf1 would be, but I feel due to its potential skin protection that I should add it in this article even if tanning is not the main focus of this article.
