Vitamin C: how much is in a daily dose of supplements
We counted the daily amount in every product containing Vitamin C in Korea's health functional food reports and the US NIH label database. We do not rate any product; we only gathered the amounts on the labels.
For reference only. This is not a diagnosis or a prescription. If you have concerns, talk to a doctor or pharmacist.
Korean products
Korea MFDS health functional food product reports (downloaded 2026-10-29) · 2025 Dietary Reference Intakes for Koreans
- Products
- 5,670
- Median daily amount
- 100 mg (middle half 50–250 mg)
- RDA (higher of men and women, age 19)
- 100 mg
- UL (lowest for ages 19–64)
- 2,000 mg
- Products above the UL: 184 (3.2% of the 5,670 compared with the UL)
US products
US NIH Dietary Supplement Label Database (DSLD, 2026-01-10 release) · US NASEM Dietary Reference Intakes
- Products
- 17,700
- Median daily amount
- 125 mg (middle half 60–470 mg)
- RDA (higher of men and women, age 19)
- 90 mg
- UL (lowest for ages 19–64)
- 2,000 mg
- Products above the UL: 592 (3.3% of the 17,700 compared with the UL)
How we counted
- The daily amount follows the daily serving on each label, using the higher amount when a range is given. Products whose daily amount cannot be worked out from the label are left out.
- Amounts from food are not included.
- The RDA is the higher value for men and women aged 19 (the AI where there is no RDA), and the UL is the lowest value for ages 19–64.
- Korean products are compared with the 2025 Dietary Reference Intakes for Koreans, and US products with the US NASEM reference values.
- The Tolerable Upper Intake Level (UL) is the highest level of daily intake that is likely to pose no risk of harmful health effects to almost all people in the general population.
- Product counts are counts of reported or registered labels, not of how much is sold.