Thompsons One-A-Day Grape Seed is standardised to provide 150mg procyanidins (OPC) in each potent 19000 mg of Grape Seed per capsule.

Grape Seed is used primarily for circulatory disorders, such as peripheral venous insufficiency. Because Grape Seed extract has antioxidant and free radical scavenging properties combined with a cell wall protective mechanism, it is also effective in the maintenance of normal function of vascular walls. Grape Seed procyanidins may also inhibit platelet aggregation. Grape Seed extract is clinically used in cases of poor peripheral circulation and eye problems related to poor blood flow to the fine capillaries of the eye.