REVIEW Magnesium ascorbyl phosphate is a salt form of L-ascorbic acid or vitamin C. Unlike L-Ascorbic Acid, it does not readily degrade in formulas containing water. It is considered light-stable and oxygen-stable. It is used in cosmetics as a potent anti-oxidant, can improve appearance of aged skin. Also it is an excellent non-irritating skin whitening agent that inhibits skin cells to produce melanin, lightens age spots via tyrosinase inhibition.
Hwang TL, Tsai CJ, Chen JL, Changchien TT, Wang CC, Wu CM. Magnesium ascorbyl phosphate and coenzyme Q10 protect keratinocytes against UVA irradiation by suppressing glutathione depletion. Mol Med Rep. (2012) Aug;6(2): 375-8.
Shaikh ZI, Mashood AA. Treatment of refractory melasma with combination of topical 5% magnesium ascorbyl phosphateand fluorescent pulsed light in Asian patients. Int J Dermatol. (2014) Jan;53(1): 93-9.
Yamada, Mikio; Tamura, Hiroaki Prevention of sediment formation in magnesium ascorbate phosphate solution for pharmaceuticals, cosmetics, and beverages Jpn. Kokai Tokkyo Koho (1987), JP 62063597 A 19870320.