Supplements for colds & flu and Elderberry
Each entry’s own grades, side by side. A grade says how strong the evidence is for one outcome — it does not rank one entry over the other.
Goal guide
Supplements for colds & flu
6 compounds relevant to colds & flu, ranked by overall evidence grade.
Grade B6 graded outcomesrevised Jul 10, 2026
Assembled by the app from other entries in this library. It adds no evidence of its own — follow the links to the entries it draws on.
Compound or practice
Elderberry
A popular cold-and-flu berry with small, industry-tinged trials suggesting shorter symptoms — real but overstated.
Grade C1 graded outcomerevised Jul 10, 2026
A structured monograph in Prometheus's bundled library. Its grades are the monograph's own reading of the evidence, not a peer-reviewed review.
Graded in both
Outcomes are matched by name. Two entries can describe the same outcome in different words, so one listed further down may still be graded in the other.
No outcome has the same name in both entries. They may still overlap under different wording — read the two lists below.
Graded only in Supplements for colds & flu
- Zinc Unclear effectEvidence grade B
- Andrographis Unclear effectEvidence grade B
- Pelargonium sidoides (Umckaloabo) Unclear effectEvidence grade B
- Elderberry Unclear effectEvidence grade C
- Echinacea Unclear effectEvidence grade C
- American Ginseng Unclear effectEvidence grade C
Graded only in Elderberry
- Cold/flu symptom duration Small effectEvidence grade C
What each entry says about the other
- Supplements for colds & flu’s entry · Goes with: Grade C
Both columns are read from the entries as they stand in this library. A comparison is not advice to take either one, and it is no substitute for a clinician who knows the person.