Evidence brief · Supplement
Echinacea for Cold incidence/duration
Evidence grade C — Near-null overall
- Overall grade
- Grade C
- Last revised
- 1
- graded outcome
- 0
- references listed
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.
1 at grade C — 1 graded row
What is known
Each outcome with its grade (how strong the evidence is, A to D), the size of the effect where the entry records one, and how often studies agree.
- Cold incidence/durationEvidence grade C
Near-null overall
Smalllow
What is uncertain
Read off the same rows as above. Nothing here is added that the entry does not itself record.
- Thin evidence: Cold incidence/duration (grade C).
The evidence in words
The verdict
For cold incidence/duration, Echinacea earns evidence grade C (small effect, low consistency) — the evidence is limited or mixed. Near-null overall
How it might work
Immune-modulating alkamides and polysaccharides; effects vary enormously by species, plant part, and preparation.
How to use it
Standardized extracts at first sign of a cold; benefits, if any, are small.
Safety & cautions
Generally safe; allergy possible (ragweed family); caution in autoimmune disease theoretically.
Bottom line
Mostly disappointing on pooled data, with a slim chance of a small effect from specific preparations. Low-risk, low-yield.
How it is used
As the entry records it, from the studies it summarises. Not a recommendation for you — doses that suit a trial population may not suit you.
- Standard
- Standardized extract at onset.
Goes with
- EchinaceaRead the full Echinacea monographEvidence grade C
Related reading
Entries that share this one's tags or conditions.
- American Ginseng for Cold incidence/durationEvidence grade C — Specific extractEvidence grade C
- Andrographis for Common coldEvidence grade B — Severity and durationEvidence grade B
- Andrographis for Upper-respiratory infection severity/durationEvidence grade B — Meta-analyticEvidence grade B
- Elderberry for Cold/flu symptom durationEvidence grade C — Small, industry-linkedEvidence grade C
Sources
This entry lists no references of its own — it is assembled from the entries it links to, whose sources are on their pages.
Last revised . A grade is this entry's reading of the evidence, not medical advice.