Moderate evidenceeffect size d = 0.55
May shorten the common cold
Sources
- Echinacea for preventing and treating the common cold (2007)
Echinacea for Immune support
Echinacea purpurea · Asteraceae
May shorten the common cold Evidence rated moderate (d = 0.55).
Want the full plant profile? See Echinacea botanical profile →
I
How it works mechanism
Macrophage and NK-cell activation via alkylamides; in vitro and modest clinical evidence.
II
Evidence cited sources
1 sourceIII
Dosage & preparation
IV
Safety & cautions
warning · immunosuppressants
Avoid combination — antagonistic.
warning · Asteraceae allergy
Cross-reactivity with ragweed, daisies.
caution · autoimmune
Theoretical concern with immune-stimulating effect; clinical relevance debated.
V
Other plants for Immune support
8 alternatives
VI
Frequently asked
Is Echinacea effective for Immune support?
May shorten the common cold Evidence is rated moderate with an effect size of d=0.55. See the Evidence section above for cited sources.
What is the recommended dose of Echinacea for Immune support?
Typical adult dose: 1.000–2.000 g as Infusion / tea, 3–6 times daily. See the Dosage table for all forms. Always start at the lower end.
What are the safety risks of Echinacea for Immune support?
Avoid combination — antagonistic. See the Safety section for the full list of contraindications and drug interactions.
How does Echinacea compare to other plants for Immune support?
See the alternatives section above — we list other species with documented effects on Immune support, ranked by evidence quality.
Is this medical advice?
No. This is educational reference. Always consult a healthcare professional before using any herbal preparation, especially alongside prescription medication.
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