Melanotan 1 is a synthetic peptide that mimics the effects of a naturally occurring hormone called alpha-melanocyte-stimulating hormone (α-MSH). It is primarily known for its potential to induce skin tanning by stimulating melanogenesis, the process where skin cells produce pigment. This makes it a subject of interest for individuals looking to achieve a tanned appearance without excessive sun exposure. It is sometimes referred to as afamelanotide and has been researched for its potential to aid in treating skin conditions, such as vitiligo and erythropoietic protoporphyria, which are affected by sun exposure. As of my last update, regulatory approval for Melanotan 1's clinical use varies by country, and it is important for users to understand the legal and health implications of using such peptides.