PlainVitamins

Comparison

Quercetin- Ascorbate Powder and IsoQuercetin

Quercetin- Ascorbate Powder (Designs for Health) lists 2 distinct ingredients and IsoQuercetin (Tomorrow's Nutrition Pro) 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)
IngredientQuercetin- Ascorbate PowderIsoQuercetin
Vitamin C500 mg (556%)540 mg (600%)
Quercetin500 mg728 mg

Amounts are per serving as DSLD gives them: Quercetin- Ascorbate Powder, 1 g; IsoQuercetin, 2 capsules. Current labels entered June 2013 and August 2025. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.

Each product on its own