 Vitamin C can be used on all skin types, except sensitive skin. Vitamin C is known as an antioxidant. Antioxidants protect skin by free radicals, which would destroy skin surface. These free radicals occur naturally in the oxygen atmosphere and are stimulated by ultraviolet light.
Topical vitamin C is in the form of L-ascorbic acid and is very useful for the skin and body. L-ascorbic acid is unsteady and may break down very quickly that's why it is so difficult to produce for cosmetic preparations.
Studies have shown that L-ascorbic acid provides photoprotection, stimulates collagen synthesis, stays in the skin up to 72 hours and prevents UV immunosuppression, a reaction that occurs in more than 90% of skin cancer patients.
Vitamin C and Sun Protection
Vitamin C protects skin of harm solar radiation. It has protective properties by neutralizing reactive oxygen species, the highly reactive molecules produced by the interaction of sunlight, cell membranes and other components of skin tissue.
It does not imbibe hence, light and is not a sunscreen, so it should not be used instead of sunscreen, but it is very good companion to sunscreen products. In addition, once vitamin C gets into the skin, it cannot be rubbed, washed or perspired off.
Vitamin C and Collagen
Vitamin C is the antioxidant that increases collagen synthesis. Collagen synthesis is vital to retain healthy skin. L-ascorbic acid signalizes in form of critical message to collagen genes to synthesize collagen, as well as being a cofactor for two enzymes important in collagen synthesis.
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