Sodium ascorbyl phosphate, also known as Stay C 50, is a new form of vitamin C. STAY-C® 50 is a vitamin C derivative with superior stability in formulations compared to straight ascorbic acid. The easily water soluble monophosphate ester of ascorbic acid is bio-convertes into Vitamin C by phosphatases present in the skin.
It is stable in aqueous formulations in part because it is not activated until it is absorbed into the skin convert to ascorbic acid, which is why you will not see it oxidized in the bottle.
As a powerful in-vivo antioxidant and free radical scavenger, Stay C 50 not only can improve acne and acne scarring but also stimulates the production of collagen and increasing skin firmness. Data also demonstrate deodorant activity, hair color protection and activity against bacteria involved in caries and gingivitis.
The concentration of sodium ascorbyl phosphate in amourōs Power C 10 Serum is 10%, which could compare to around a 20% concentration of ascorbic acid. With the Stay C 50, the Power C 10 Serum helps protect from photo damage for beautiful and healthy looking skin, improves skin firmness, decreases appearance of age spots, visibly evens the skin tone.