What are the recommended dietary allowances (RDAs) for vitamin C (ascorbic acid)?

Updated: Jun 01, 2020
  • Author: Mark Rosenbloom, MD, MBA; Chief Editor: Michael A Miller, MD  more...
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Vitamin C (ie, ascorbic acid) is found in citrus fruits and vegetables. An antioxidant and reducing agent, its controversial uses include treatment of upper respiratory tract infections and cancer. [8] Supplements are usually 100-2000 mg per capsule.

The RDAs for vitamin C are as follows (it has been found that individuals who smoke need an additional 35 mg/day) [9] :

  • Adult males (19 y or older) - 90 mg

  • Adult females (19 y or older) - 75 mg

  • Pregnancy (19 y or older) - 85 mg

  • Lactation (19 or older) - 120 mg

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