What's the RDA for Vitamin C? - Usrda of vitamin c for an adult
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Vitamin C overview for health professionals. The U.S. Department of Agriculture's (USDA's) FoodData Central · external link disclaimer mean intakes of vitamin C are mg/day for adult males and mg/day for adult. Estimates of median dietary intakes of vitamin C for adults are mg/day and 72 mg/day in the United States and Canada, respectively. The Tolerable Upper.