Found an exceptionally comprehensive article on Grapes, from The World’s Healthiest Foods. So much I didn’t even consider with grapes, have a look see at this source which has an abundance of information on grapes, including: in-depth nutritional and phytonutrient profiles; recipes; selection and storage; and several references to support claims.
Below diagram captures just a few of the many benefits grapes found in this article.
===Source: “Grapes” http://www.whfoods.com/ . http://www.whfoods.com/genpage.php?tname=foodspice&dbid=40. May 12, 2017.