Comparison
Vitamin C and Bio-Quercetin Phytosome and Quercetin-C
Vitamin C and Bio-Quercetin Phytosome (Life Extension) lists 3 distinct ingredients and Quercetin-C (Cardiovascular Research) 4 (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 0.71.
| Ingredient | Vitamin C and Bio-Quercetin Phytosome | Quercetin-C |
|---|---|---|
| Vitamin C | 1,000 mg (1111%) | 100 mg (111%) |
| Quercetin | 15 mg | 100 mg |
| Phosphatidylcholine | not disclosed | 0.25 mg |
| Rutin | 250 mg |
Amounts are per serving as DSLD gives them: Vitamin C and Bio-Quercetin Phytosome, 1 vegetarian tablet; Quercetin-C, 1 capsule. Current labels entered June 2025 and March 2024. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.
Each product on its own
- Vitamin C and Bio-Quercetin PhytosomeLife Extension: every row against all products listing it
- Quercetin-CCardiovascular Research: every row against all products listing it