Also known as: Purple coneflower
A popular herbal cold remedy with inconsistent evidence. Products vary widely in species and plant part.
Common forms: Capsules · Tinctures · Tea
Draft summary, not yet reviewed by a qualified health professional · Last updated 2026-11-03
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This information is for education only and is not medical advice, diagnosis, or treatment. Supplements can interact with medications and health conditions. Check with your doctor or pharmacist before starting anything, especially if you take medication, are pregnant or breastfeeding, or have a health condition. These statements have not been evaluated by the FDA; supplements are not intended to diagnose, treat, cure, or prevent any disease.
An older meta-analysis suggested echinacea reduced the odds of catching a cold, but trials vary greatly in product and quality, and later reviews found weak or no benefit.
Not enough safety data — avoid unless your provider recommends it.
This list covers common medication classes only and is not exhaustive.
Look for third-party testing seals (USP Verified, NSF Certified, or Informed Choice) and match the form and dose used in studies.