Acetyl Hexapeptide-1

goodie
Also-called-like-this: Melitane

Acetyl Hexapeptide-1 is a bit of a special snowflake among peptides as it's not a wrinkle-smoothing, anti-aging active like most of the other ones but it can stimulate pigmentation and melanin production (by interacting with a skin cell receptor called MC1R).

As melanin not only gives the skin its nice tanned color but also works as a natural protection factor, Acetyl Hexapeptide-1, aka Melitane does the same.  It not only boosts a natural or an artificial tan but gives extra protection against UV-induced DNA and free radical damage and protects the skin against UV-caused redness.