Comparison
D3 10,000 IU and D3 250 mcg (10,000 IU)
D3 10,000 IU (21st Century) lists 2 distinct ingredients and D3 250 mcg (10,000 IU) (21st Century) 2 (rows of one ingredient counted once); 2 are on both labels. On the site's similarity measure, which compares ingredient lists (1 for the same list, rarer ingredients counting for more; amounts are not part of it), the two formulas score 1.00: the same ingredients, at the amounts in the table below.
| Ingredient | D3 10,000 IU | D3 250 mcg (10,000 IU) |
|---|---|---|
| Calcium | 57 mg (4%) | 57 mg (4%) |
| Vitamin D | 250 mcg (1250%) | 250 mcg (1250%) |
Amounts are per serving as DSLD gives them: D3 10,000 IU, 1 tablet; D3 250 mcg (10,000 IU), 1 tablet. Current labels entered August 2020 and April 2025. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.
Each product on its own
- D3 10,000 IU21st Century: every row against all products listing it
- D3 250 mcg (10,000 IU)21st Century: every row against all products listing it