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proanthocyanidin

pro·an·tho·cy·an·i·din [ prō ànthō sī ánnə din ] (plural pro·an·tho·cy·an·i·dins)


noun 
Definition:
 
natural antioxidant: any one of a class of flavonoids found in many plants that can be used as a dietary supplement to enhance immunity and to strengthen connective tissue. High concentrations of proanthocyanidins are found in pine bark and in grape seeds and skins.

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