This is a popular cosmetic product intended for wrinkle reduction.
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Patricia K. Farris MD reported on Dermatologic Surgery that "A significant body of scientific research supports the use of cosmeceuticals containing vitamin C. Cutaneous benefits include promoting collagen synthesis, photoprotection from ultraviolet A and B, lightening hyperpigmentation, and improvement of a variety of inflammatory dermatoses. Because of the diverse biologic effects of this compound, topical vitamin C has become a useful part of the dermatologist's armamentarium."
Hyaluronic acid is also used as a useful ingredient in this and other similar products. This compound is believed to help holding of water and reduce skin damage induced by sun rays. When it is used along with vitamin C, it helps vitamin C provide a better anti-aging effect.