Assertion: grape juice's antioxidant | /r/AtLocation | their findings
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Source sentences:
text: In their findings, reported in the January 2000 issue of the American Journal of Clinical Nutrition, a key antioxidant called catechin remained in the blood for more than 4 hours after the volunteers drank the nonalcoholic wine, compared to only 3.2 hours for the full-strength cabernet.