Echinacea Purpurea
herbs
Echinacea purpurea is a flowering plant native to North America traditionally used to support immune function and reduce the duration and severity of upper respiratory infections. Scientific evidence for its efficacy is mixed, with some studies showing modest benefits whilst others demonstrate minimal effect.
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Benefits
Dosage
Typical Dose
300-500 mg daily (standardised extract)
Upper Limit
1000-2000 mg daily (divided doses)
Timing
Daily for prevention; at first symptoms for acute use. Most effective within 24-48 hours of symptom onset
Forms & Bioavailability
Dried herb/tea
Moderate
Standardised extract (4:1 or 6:1)
High
Tincture (hydroalcoholic)
High
Capsule/tablet
Moderate to High
Side Effects
Interactions
Research Summary
Clinical evidence is mixed. Meta-analyses suggest modest reductions in cold duration (1-2 days shorter) and symptom severity. Some high-quality trials show no significant benefit. Most effective when taken prophylactically or at symptom onset. Quality varies significantly between commercial products depending on plant part used and extraction method. Further standardised research required for definitive efficacy claims.
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The Bottom Line on Echinacea Purpurea
Echinacea Purpurea is moderately researched with promising but sometimes mixed evidence.It is most commonly used for may reduce duration and severity of common cold symptoms and supports immune system function through polysaccharide content. 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 Purpurea
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