Grape seed proanthocyanidins
Food or supplementMeasured in people, not heightBy mouthNutrient
An antioxidant extract of grape seeds, sold as a supplement. It is a mixture, not one chemical.
Condensed tannins from Vitis vinifera seed, sold as a supplement. An antioxidant mixture rather than a single compound, with no specific molecular target.
Risks. Widely eaten and sold, with no particular toxicity reported.
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Educational content, not medical advice. Nothing here is a recommendation to take or stop taking anything — talk to a doctor about your own situation.