Echinacea
herbs
Echinacea is a flowering plant native to North America traditionally used to support immune function and reduce the duration of cold symptoms. Modern research shows modest evidence for its effectiveness, particularly when taken at the onset of illness.
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Benefits
Dosage
Typical Dose
300-500mg three times daily
Upper Limit
1000mg daily
Timing
At first sign of illness or during cold/flu season
Forms & Bioavailability
Dried herb/tea
Moderate; whole plant provides diverse compounds
Standardised extract
High; concentrated active constituents
Capsule/tablet
Moderate to high depending on standardisation
Tincture
Good; liquid extraction enhances absorption
Side Effects
Interactions
Research Summary
Clinical evidence for echinacea is mixed; some studies suggest modest reduction in cold duration by 1-2 days when taken early, whilst others show minimal benefit. The variability in research outcomes reflects differences in echinacea species, extraction methods, and study design. Most evidence supports preventative use during illness exposure rather than treatment of established infections.
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The Bottom Line on Echinacea
Echinacea is moderately researched with promising but sometimes mixed evidence.It is most commonly used for may reduce cold duration and immune system support. As with any supplement, individual results vary. Start with the lower end of the dosage range and assess for 4-8 weeks before adjusting.
About Our Research
This profile is compiled from peer-reviewed research published on PubMed, the NIH Office of Dietary Supplements, and established nutritional science databases. Dosages reflect clinically-studied amounts from human trials where available. We update profiles as new research emerges. This is not medical advice — consult a healthcare professional before supplementing.
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Goal Guides for Echinacea
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