90 day supply, stimulates natural tanning and skin health. Use as needed:  Melanotan II (MT-II) is a synthetic analog of the naturally occurring alpha-Melanocyte-Stimulating Hormone (alpha-MSH), known for its dual actions on the body. Primarily, it is an agonist of the melanocortin 1 receptor, which stimulates the production of melanin, resulting in increased skin pigmentation and a tanning effect that may offer some photoprotection.  Additionally, MT-II activates receptors in the central nervous system, which have been linked to enhanced sexual arousal and spontaneous penile erections in men. May boost libido and sexual performance.