Form of vitamin C that has antioxidant properties.  Ascorbic acid is difficult to stabilize in formulations. [2, 3] Its acid component can be a skin irritant, so formulary steps must be taken to reduce potential irritation, while ensuring the ingredient retains its considerable benefits for skin.
- Stamford N. Stability; transdermal penetration; and cutaneous effects of ascorbic acid and its derivatives.. J Cosmet Dermatol.. 2012;11(4):310-7.
- Telang P. Vitamin C in dermatology.. Indian Dermatol Online J. 2013;4(2):143-146.
- Gallarate M, Carlotti M, Trotta M, Bovo S. On the stability of ascorbic acid in emulsified systems for topical and cosmetic use.. Int J Pharm. 1999;188(2):233-41.