Melanotan 2 peptide acts as a non-selective agonist of the melanocortin receptorsone of the most popular and effective nutritional supplements as well as the powerful product for bodybuilders and athletes. It is given as a shot to produce erections in men with ED (erectile dysfunction), tan the skin. From some studies reported, it increases rigidity and duration of male erection, as well as male sexual desire. It has also been shown to increase female sexual desire in patients with sexual arousal disorder.