Herb & BotanicalNo.036
Echinacea
Cold prevention / duration (marketed).
Typical / RDAPer label
Upper limitShort-term use
EvidenceLimited
How to take it
Timing At first symptomsFood OptionalForm Purpurea extract
What to know
Taken to fend off colds, but trial results are inconsistent and any effect is small. Best used short-term rather than continuously.
Interactions & cautions
- Allergy possible if sensitive to ragweed/daisies.
Do you actually need it?
Modest, inconsistent evidence for colds.
Reference values: NIH Office of Dietary Supplements, adult general population. Educational information only — not medical advice. Confirm with a healthcare professional.