Vitamin C serums are often touted for their skin benefits, but can they provide added sun protection? While antioxidants like vitamin C may enhance the effects of sunscreen, they are not a substitute for it, according to dermatologists.
How Sunscreen and Vitamin C Differ
Sunscreen primarily blocks UVB rays, which cause sunburn and contribute to skin cancer, and UVA rays, which lead to aging. Vitamin C does not block these rays, says Rosalind Simpson, a professor of dermatology at the University of Nottingham. Instead, it acts as an antioxidant, neutralizing free radicals generated by UV exposure and pollution that can damage collagen and skin firmness.
Antioxidants as an Additional Defense
“Antioxidants such as vitamin C have become a hot topic,” Simpson says. “People are really interested in whether they can improve skin appearance by neutralising free radicals created by UV exposure and pollution.” While sunscreen acts as a UV filter, antioxidants provide an extra line of defense by stabilizing free radicals that can disrupt cell structures.
Evidence from Studies
A 1996 study examined antioxidants, including vitamins C and E, with and without sunscreen. It found that vitamin C enhanced protection against UVA-induced skin damage only when used alongside sunscreen. Researchers concluded that antioxidants may offer additional protection when combined with established sun-protection products.
Expert Recommendations
“Nothing is a substitute for a good quality, broad-spectrum sunscreen with UVA and UVB protection and sensible habits when in the sunshine,” Simpson emphasizes. This includes wearing sunscreen, reapplying it regularly, and limiting direct sun exposure during peak hours.
