Fast Five Quiz: Vitamin C

Romesh Khardori, MD, PhD

Disclosures

June 24, 2021

According to the National Institutes of Health, the RDAs for vitamin C are as follows:

  • Adult men (19 years or older) – 90 mg

  • Adult women (19 or older) – 75 mg

  • Pregnancy (19 or older) – 85 mg

  • Lactation (19 or older) – 120 mg

People who smoke need an additional 35 mg/day.

The RDAs for vitamin C in children are as follows:

  • Age 0-6 months (adequate intake) – 40 mg

  • Age 7-12 months (adequate intake) – 50 mg

  • Age 1-3 years – 15 mg

  • Age 4-8 years – 25 mg

  • Age 9-13 years – 45 mg

  • Age 14-18 years (men) – 75 mg

  • Age 14-18 years (women) – 65 mg

  • Pregnancy (14-18 years) – 80 mg

  • Lactation (14-18 years) –115 mg

The UL for vitamin C is as follows:

  • 0-12 months: Not possible to establish

  • 1-3 years: 400 mg

  • 4-8 years: 650 mg

  • 9-13 years: 1200 mg

  • 14-18 years: 1800 mg

  • Older than 19 years: 2000 mg

Read more about RDAs for various vitamins.

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