"While sunscreen remains the number-one way to protect against ultraviolet radiation, it's not enough. Studies consistently show that not only are people not applying enough or as often as they should, but broad-spectrum sunscreen does not provide enough protection against free radicals. Using an effective antioxidant serum is therefore part of a comprehensive method to protect. Given my worsening pigmentation in the summer, I use ISDIN Melaclear Dark Spot Correcting Serum ($82) which has L-ascorbic acid as well as phytic acid for skin brightening."