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Echinacea

Supplement botanical immune
Aka: Echinacea purpurea, coneflower
Brands seen in Singapore: ChildLife Essentials, NOW Foods, Nature's Answer, Nature's Way, Nature's Bounty
Not medical advice. Check with your doctor or pharmacist before you start, stop or change the timing of anything you take.
How to use
What it’s for
Colds — may slightly cut the odds of catching one
When to take
Daily
Studied for
Prevention trials ran 8 weeks to 4 months
Pros & cons
Pros
  • NCCIH: may slightly lower the odds of catching a cold
  • 30 trials, 5,652 people pooled in a 2024 meta-analysis
  • Adverse events matched control in that pooled analysis
Cons
  • Unclear whether it shortens a cold once you have one
  • Allergic reactions happen and can be severe
  • Three of its authors took honoraria from a.vogel ag
Sources
  1. NCCIH — Echinacea: Usefulness and Safety (last updated November 2024), What Have We Learned? · read 2026-08-27
    what it says
    “Taking echinacea may slightly reduce your chances of catching a cold. It's still unclear whether echinacea can shorten the length of a cold. More research is needed to confirm these findings.”
  2. NCCIH — Echinacea, What Do We Know About Safety? · read 2026-08-27
    what it says
    “some people have allergic reactions to echinacea, which may be severe. The most common side effects of echinacea are digestive tract symptoms, such as abdominal pain, nausea, or stomach pain”
  3. NCCIH — Echinacea, safety in children · read 2026-08-27
    what it says
    “some children participating in a clinical trial of echinacea developed rashes, which may have been caused by an allergic reaction. There is concern that allergic reactions could be severe in some children”
  4. NCCIH — Echinacea, pregnancy and breastfeeding · read 2026-08-27
    what it says
    “possibly safe for up to 7 days during the first trimester of pregnancy … Little is known about whether it's safe to use echinacea while breastfeeding.”
  5. NCCIH — Echinacea, interactions · read 2026-08-27
    what it says
    “There is conflicting evidence about whether echinacea interacts with some drugs metabolized by the liver, and there are theoretical reasons to suspect that echinacea might interact with immunosuppressants or caffeine.”
  6. NCCIH — Echinacea, Background (plant family) · read 2026-08-27
    what it says
    “Echinacea species are perennials that are closely related to sunflowers, daisies, and ragweed.”
  7. Gancitano et al., Echinacea Reduces Antibiotics by Preventing Respiratory Infections: A Meta-Analysis (ERA-PRIMA), Antibiotics 2024 — pooled result · read 2026-08-27
    what it says
    “30 clinical trials (39 comparisons) studying Echinacea for the prevention or treatment of RTIs in 5652 subjects. Echinacea significantly reduced the monthly RTI occurrence, risk ratio (RR) 0.68 (95% CI 0.61-0.77)”
  8. ERA-PRIMA meta-analysis, Antibiotics 2024 — adverse events · read 2026-08-27
    what it says
    “An equal number of adverse events occurred with Echinacea and control treatment … In most cases, adverse events were mild, self-limiting, gastrointestinal in nature and did not require medical intervention.”
  9. ERA-PRIMA meta-analysis, Antibiotics 2024 — Table A1, daily dose and duration of included adult prevention trials · read 2026-08-27
    what it says
    “Jawad et al., 2012 … 4 mts Prevention … 2400–4000 mg … Melchart (1998) … 3 mts Prevention … 1800 mg … O'Neil J et al., 2008 … 8 weeks Prevention 3 × 2 capsules/1800 mg”
  10. ERA-PRIMA meta-analysis, Antibiotics 2024 — Conflicts of Interest statement · read 2026-08-27
    what it says
    “R.S., W.C.A. and S.L.J. received honoraria from A.Vogel AG Switzerland for consulting work. G.H. received honoraria for statistical evaluation of this meta-analysis.”
  11. HSA — Guidelines on Prohibited and Restricted Ingredients in Health Supplements and Traditional Medicines, GL-CHPB-1-012 Rev 001 (Oct 2025), Annex A/B — searched, no row for this ingredient · read 2026-08-27
    what it says
    “The objective of this guideline is to highlight the substances of concern when used in HS and TM and is not meant to be an exhaustive list.”
  12. iHerb Singapore — Echinacea Supplements category (default order, 1 - 48 of 78 results); first 5 distinct brands: ChildLife Essentials, NOW Foods, Nature's Answer, Nature's Way, Nature's Bounty · read 2026-08-27
    what it says
    “ChildLife Essentials, Essentials, Echinacea … NOW Foods, Echinacea, 250 Veg Capsules … Nature's Answer, Echinacea Root, Fluid Extract … Nature's Way, Echinacea Astragalus & Reishi … Nature's Bounty, Echinacea, 400 mg”
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Updated 2026-08-29. Every line above traces to a numbered source. Kozen-X is not a medical device and does not give medical advice. It lists what published sources have written down — nothing more. A pair not listed is unrecorded, not cleared. Before you start, stop or re-time anything, talk to your doctor or pharmacist.