PromaCare®EAA is a derivative of ascorbic acid, one of the most excellent derivative so far. It is very stable in chemical structure, and it’s a genuine stable and non-discoloring derivative of ascorbic acid, with better performance, because its routine of metabolism is same as Vitamin C after it enters into skin. High bioavailability, being easy to penetrate cuticle to enter dermis, and be decomposed to VC by bio-enzyme. Stops melanin production by inhibiting activity of tyrosinase.