Also-called-like-this: Tetrahydrocurcuminoids, Curcumin

It's one of those ingredients that defies the *BS* theory that if you cannot pronounce it, it must be an evil synthetic and you should not put it on your face.

It comes from the well-known Indian spice, turmeric and is part of a trio called Tetrahydrocurcuminoids (THC). You can read more about THC's good properties here