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Proanthocyanidins  

Proanthocyanidins are a group of flavonoids with strong antioxidant properties. Proanthocyanidins may reduce the risk of cardiovascular disease and cancer, while some proanthocyanidins may protect against urinary tract infections. (refs. 111-115) Proanthocyanidins are found in:

tea
cocoa
many berries
grapes/grape juice
cranberries/cranberry juice
red wine

Check out the USDA database at www.nal.usda.gov/fnic/foodcomp/ to find out the proanthocyanidin content of select foods and beverages.