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.
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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