Stable, water-soluble form of vitamin C that functions as an antioxidant. [1,2]There’s limited, but promising, research demonstrating that concentrations above 1% have antibacterial action against acne-causing bacteria, while concentrations of 5% reduce the inflammatory response related to acne. [3,4] This form of vitamin C is also potentially effective for lightening skin discolorations, although there isn’t much research supporting its use for this purpose over other forms of vitamin C.
- Carlotti M, Ugazio E, Gastaldi L, Sapino S, Vione D, Fenoglio I, Fubini B. Specific effects of single antioxidants in the lipid peroxidation caused by nano-titania used in sunscreen lotions. J Photochem Photobiol B. 2009;96(2):130-5.
- Segall A, Moyano M. Stability of vitamin C derivatives in topical formulations containing lipoic acid, vitamins A and E. Int J Cosmet Sci. 2008;30(6):453-8.
- Ruamrak C, Lourith N, Natakankitkul S. Comparison of clinical efficacies of sodium ascorbyl phosphate; retinol and their combination in acne treatment. Int J Cosmet Sci. 2009;31(1):41-6.
- Klock J, Ikeno H, Ohmori K, Nishikawa T, Vollhardt J, Schehlmann V. Sodium ascorbyl phosphate shows in vitro and in vivo efficacy in the prevention and treatment of acne vulgaris. Int J Cosmet Sci. 2005;27(3):171-6.