We always recommend using SPF protection to help keep skin protected from UVA/UVB rays and pollution, which can cause the first signs of aging. The antioxidant benefits of Vitamin C can complement the protective effects of SPF. In fact, it is beneficial to apply Vitamin C before you head outdoors. Topical Vitamin C has been demonstrated to decrease generation of UVA-induced free radicals and can bolster skin’s antioxidant defenses with Vitamin E regeneration.