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Recommended Dietary Allowance (RDA)

The recommended daily intake of vitamin C varies according to age, sex, risk group cigarette smokers, alcohol users, institutionalized elderly and subjects on certain drugs) and criteria applied in individual countries. The recommended dietary allowances for vitamin C in the USA were recently revised upwards, to 90 mg/day for men and 75 mg/day for women based on pharmacokinetic data.

For smokers, these recommended dietary allowances for vitamin C are increased by an additional 35 mg/day. Also for pregnant (85 mg/day) and lactating women (120 mg/day) higher amounts of vitamin C are recommended. The RDAs are in a similar range in other countries.

Recent evidence sets the estimate for the needs to maintain optimal health in the region of 100 mg daily.