an herbal extract that typically contains 95% proanthocyanidins as active components; historically used as an antioxidant.

GoldBamboo

... Grape seed extract contains chemicals known as polyphenols, (including the subclass of proanthocyanidins), which are recognized to be effective antioxidants. Substances thought to protect body cells from damage caused by a chemical process called oxidation, which produces oxygen free radicals; antioxidants are believed to work in a number of ways. They may lessen oxidation, they may inactivate oxygen free radicals, and/or they may restore at least some normal functioning to tissues damaged by oxygen free radicals. ...
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?Vitis vinifera Scientific classification Kingdom: Plantae D ...
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