What is it?Holland & Barrett Double Strength Grapeseed Extract capsules contain grapeseed extract. The power of grapes has been recognised since ancient times. The seeds in grapes contain an array of polyphenols and flavonoids. They also contain proanthocyanidins, which are naturally occurring bioflavonoids.Contains Naturally Occurring Bioflavonoids Suitable For Vegetarians and Vegans What Are the Benefits of This Supplement?Grape seeds contain compounds such as flavonoids, catechins and proanthocyanidins. Grapeseed Extract contains oligomeric proanthocyanidins (OPCs) and other polyphenolic compounds. Proanthocyanidins are naturally occurring bioflavonoids. Holland & Barrett International Limited, Barling Way, CV10 7RH, UKHolland & Barrett Limited, 45 Henry St, D01 E9X8, Ireland