Comparison
C-500 mg and Vitamin C 1,000 mg
C-500 mg (Swanson) lists 2 distinct ingredients and Vitamin C 1,000 mg (Harmonia) 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 | C-500 mg | Vitamin C 1,000 mg |
|---|---|---|
| Vitamin C | 500 mg (556%) | 1,000 mg (1111%) |
| Rose Hip | 50 mg | 50 mg |
Amounts are per serving as DSLD gives them: C-500 mg, 1 tablet; Vitamin C 1,000 mg, 1 tablet. Current labels entered September 2025 and January 2025. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.
Each product on its own
- C-500 mgSwanson: every row against all products listing it
- Vitamin C 1,000 mgHarmonia: every row against all products listing it