How Melanotan 2 Affects Hair Colour Especially in Red or Ginger Hair Pure MT2 Freckles develop when specific skin cells produce extra melanin in response to sunlight. When ultraviolet rays reach the skin, melanocytes release melanin to protect deeper layers from damage. In some Freckles Sun Spots Lentigines Treatments in NW DC GZ Skin and Face Sun Spots vs Freckles on Dark Skin What's the Difference? BGS The Difference Between Moles, Freckles, and Cancerous Spots I accidentally undid years of skin work and didn't realize it until it was too late. At the beginning of November, I started taking melanotan 2 and honestly? I loved it.