Melanotan 2 is a synthetic peptide similar to Melanotan 1, but with increased potency and different effects. It acts as a melanocortin receptor agonist, stimulating melanin production to promote skin tanning and pigmentation. In addition to enhancing pigmentation, Melanotan 2 has been reported to suppress appetite and boost libido, making it popular for both tanning and potential sexual health benefits. It is often used via injections for rapid tanning, although its use should be approached cautiously and under medical supervision due to possible side effects.