... Factory 5. Quick Shipment Name: Grape Seed Extract, Grape Skin Extract, Wild Grape Extract PowderPlant Origin: Vitis vinifera LUsed Part: Seed, ... Ingredients: phenolics, procyanidin, polyphenolAppearance:Red brown powder Grape seed extract polyphenols: 1. 95% by UV, folin assay 2. 95 ... . Polyphenols 25%, 30% 3. Resveratrol 5% Grape seed extract may have other possible anti-disease properties, such as:1 ...