Comparison
Ultra Soy Extract and SpectraSoy
Ultra Soy Extract (Life Extension) lists 4 distinct ingredients and SpectraSoy (Metagenics) 5 (rows of one ingredient counted once); 4 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 0.77.
| Ingredient | Ultra Soy Extract | SpectraSoy |
|---|---|---|
| Soy | 625 mg | 113 mg |
| Isoflavones | 250 mg | 45 mg |
| Genistein | 93.75 mg | not disclosed |
| Daidzein | 87.5 mg | not disclosed |
| Glycitein | not disclosed |
Amounts are per serving as DSLD gives them: Ultra Soy Extract, 1 vegetarian capsule; SpectraSoy, 1 tablet. Current labels entered May 2025 and December 2019. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.
Each product on its own
- Ultra Soy ExtractLife Extension: every row against all products listing it
- SpectraSoyMetagenics: every row against all products listing it