What is it Made Of?
Vitamin E, flavonoids, linoleic acid, and OPCs are highly concentrated in grape seeds. Lower concentrations of these compounds are also available in the skin of the grape, as well as grape juice and wine. Resveratrol is another compoud in grapes and grape skins that is related to OPCs. Resveratrol has become very popular as an antioxidant and is being studied in connection with a variety of diseases.