Comparison
Immune System Formula and Echinacea Astragalus & Reishi
Immune System Formula (Christopher's Original Formulas) lists 4 distinct ingredients and Echinacea Astragalus & Reishi (Nature's Way) 3 (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 0.76.
| Ingredient | Immune System Formula | Echinacea Astragalus & Reishi |
|---|---|---|
| Astragalus | not disclosed | not disclosed |
| Reishi mushroom | not disclosed | not disclosed |
| Echinacea purpurea | not disclosed | not disclosed |
| Eleuthero | not disclosed |
Amounts are per serving as DSLD gives them: Immune System Formula, 2 capsules; Echinacea Astragalus & Reishi, 3 capsules. Current labels entered April 2019 and September 2025. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.
Each product on its own
- Immune System FormulaChristopher's Original Formulas: every row against all products listing it
- Echinacea Astragalus & ReishiNature's Way: every row against all products listing it