Comparison
Vitamin C Capsules and C-M-K Citrate
Vitamin C Capsules (Douglas Laboratories) lists 3 distinct ingredients and C-M-K Citrate (Progressive Professional from Progressive Laboratories) 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 | Vitamin C Capsules | C-M-K Citrate |
|---|---|---|
| Calcium | 180 mg (14%) | 100 mg (8%) |
| Magnesium | 100 mg (24%) | 100 mg (24%) |
| Potassium | 20 mg (under 1%) | 25 mg (under 1%) |
Amounts are per serving as DSLD gives them: Vitamin C Capsules, 2 capsules; C-M-K Citrate, 1 capsule. Current labels entered June 2012 and April 2022. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.
Each product on its own
- Vitamin C CapsulesDouglas Laboratories: every row against all products listing it
- C-M-K CitrateProgressive Professional from Progressive Laboratories: every row against all products listing it