Potent polyphenolic antioxidant abundant in red grapes and, therefore, in red wine. 

Applied topically, resveratrol helps protect skin’s surface and helps rebuff negative environmental influences. It also has significant skin-calming properties that may help minimize the look of redness. 

References for this information:
Journal of Drugs in Dermatology, December 2013, pages 1389-1394
Archives of Biochemistry and Biophysics, April 2011, pages 164-170
Antioxidants and Redox Signaling, December 2001, pages 1041-1064

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