Grape Seed Extract 100 mg 60 caps Grape Seed Extract by Food Science. Food Science Grape Seed Extract description: Providing 100 mg. of Standardized Grape Seed Extract plus a base of Pine Bark Extract per capsule. This powerful anti-oxidant provides 95% Proanthocyanidins and 100% Total Polyphenols. Only Grape Seed Extract contains the Gallic Esters of Proanthocyanidings thought to be the most effective Free-Radical Scavenger of any product available. Available in 50 and 100 capsule sizes. Everyday low prices!