Comparison

No-Flush Niacin 500 mg and Non-Flush Niacin 500 mg

No-Flush Niacin 500 mg (Source Naturals) lists 2 distinct ingredients and Non-Flush Niacin 500 mg (Nature's Harmony) 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.

Amount per serving (and % of the Daily Value)
IngredientNo-Flush Niacin 500 mgNon-Flush Niacin 500 mg
Niacin500 mg (3125%)500 mg (3125%)
Inositol143 mg143 mg

Amounts are per serving as DSLD gives them: No-Flush Niacin 500 mg, 1 tablet; Non-Flush Niacin 500 mg, 0 capsules. Current labels entered October 2022 and May 2013. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.

Each product on its own