Vitamin D: how much is in a daily dose of supplements
We counted the daily amount in every product containing Vitamin D 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
- 7,982
- Median daily amount
- 10 μg (middle half 10–20 μg)
- RDA (higher of men and women, age 19)
- 10 μg
- UL (lowest for ages 19–64)
- 100 μg
- Products above the UL: 174 (2.2% of the 7,982 compared with the UL)
US products
US NIH Dietary Supplement Label Database (DSLD, 2026-01-10 release) · US NASEM Dietary Reference Intakes
- Products
- 13,002
- Median daily amount
- 20 μg (middle half 10–37.5 μg)
- RDA (higher of men and women, age 19)
- 15 μg
- UL (lowest for ages 19–64)
- 100 μg
- Products above the UL: 1,169 (9% of the 13,002 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.