Comparison
Ester-C and PurWay-C
Ester-C (Kala Health) lists 3 distinct ingredients and PurWay-C (Vitabase) 3 (rows of one ingredient counted once); 3 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 | Ester-C | PurWay-C |
|---|---|---|
| Vitamin C | 790 mg (878%) | 500 mg (556%) |
| Calcium | 90 mg (7%) | 90 mg (7%) |
| Flavonoid | 100 mg | 100 mg |
Amounts are per serving as DSLD gives them: Ester-C, 1 tablet; PurWay-C, 1 vegetarian capsule. Current labels entered July 2024 and March 2012. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.