Comparison

Riboflavin Vitamin B2 USP and Vitamin B-2 50 mg

Riboflavin Vitamin B2 USP (PureBulk.com) lists 1 distinct ingredients and Vitamin B-2 50 mg (Windmill) 1 (rows of one ingredient counted once); 1 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)
IngredientRiboflavin Vitamin B2 USPVitamin B-2 50 mg
Riboflavin50 mg (3846%)50 mg (3846%)

Amounts are per serving as DSLD gives them: Riboflavin Vitamin B2 USP, 50 mg; Vitamin B-2 50 mg, 1 tablet. Current labels entered June 2013 and March 2012. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.

Each product on its own