Comparison

C 1000 mg and C Extra 500 mg Plus 250 mg Bioflavonoids

C 1000 mg (Thompson) lists 5 distinct ingredients and C Extra 500 mg Plus 250 mg Bioflavonoids (Natural Factors) 5 (rows of one ingredient counted once); 5 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.

Amount per serving (and % of the Daily Value)
IngredientC 1000 mgC Extra 500 mg Plus 250 mg Bioflavonoids
Vitamin C1,000 mg (1111%)500 mg (556%)
Flavonoid10 mg250 mg
Rutin10 mg50 mg
Hesperidin10 mg25 mg
Dog Rose20 mg25 mg

Amounts are per serving as DSLD gives them: C 1000 mg, 1 tablet; C Extra 500 mg Plus 250 mg Bioflavonoids, 1 capsule. Current labels entered August 2014 and April 2012. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.

Each product on its own