Why is topical vitamin C important for skin health? Topical vitamin C is a science-backed, dermatologist-favorite ingredient that may help slow early skin aging, prevent sun damage, and improve the appearance of wrinkles, dark spots, and acne. Vitamin C is an antioxidant, meaning it fights harmful free radicals (toxins) that come in contact with your skin from external sources like air pollution, or from inside the body as a result of normal processes like your metabolism. Free radicals can damage the skin, and applying topical vitamin C can combat free radicals and may improve the skin’s overall appearance.Skin benefits of vitamin CA few clinical studies have demonstrated that vitamin C can improve wrinkles. One study showed that daily use of a vitamin C formulation for at least three months improved the appearance of fine and coarse wrinkles of the face and neck, as well as improved overall skin texture and appearance.Vitamin C may also help protect the skin from harmful ultraviolet rays when used in combination with a broad-spectrum sunscreen. Clinical studies have shown that combining vitamin C with other topical ingredients, namely ferulic acid and vitamin E, can diminish redness and help protect the skin from long-term damage caused by harmful sun rays.