There is one report showing that resveratrol may lose some of its antioxidant activity upon sun exposure (UV radiation) and that it can be prevented by adding certain suncreens to a formula. However, these findings have so far not been confirmed by other studies and it is not clear whether or not other functions of resveratrol may be altered as well (e.g. skin-whitening effect). Thus, it is not clear yet whether resveratrol should be used only in night creams or together with suncreens.
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