Echinacea has been a cold-season staple for generations. The research is more mixed than its reputation: a possible small benefit for prevention, and not much for shortening a cold.
Written by Vita Globe Editorial Team | Reviewed against NCCIH guidance, Cochrane reviews and peer-reviewed research
Does echinacea actually work?
The evidence suggests a small effect at best. The NIH's NCCIH says echinacea may slightly reduce your chances of catching a cold, but it's unclear whether it shortens colds[1]. A Cochrane review of 24 trials found no clear treatment benefit, with a possible weak benefit for some products[2]. A 2019 meta-analysis found a modest preventive effect but no shortening of illness[3].
Caveat: Echinacea products vary widely in species, plant part and extraction method, which makes study results hard to compare[2].
Sources: NCCIH · Cochrane 2014 · David 2019 · Verified 2026-09-27
In this article
What is echinacea?
Echinacea is a group of flowering plants related to sunflowers, daisies and ragweed. The three species most often studied are Echinacea purpurea, E. angustifolia and E. pallida[1]. Products use different parts of the plant (roots, flowers, leaves) and different extraction methods, so two "echinacea" supplements can be quite different[2].
Can echinacea help prevent colds?
This is where the evidence is most encouraging, though still modest. The Cochrane review found that none of its individual prevention comparisons showed a statistically significant difference, but pooled analysis suggested a relative risk reduction of roughly 10% to 20%[2]. A 2019 systematic review and meta-analysis estimated a similar modest preventive effect (a risk ratio of about 0.78), while questioning whether it's large enough to matter clinically[3].
In plain terms: echinacea may slightly lower your odds of catching a cold. It isn't a shield.
Does echinacea shorten a cold once you have one?
The evidence here is weaker. In the Cochrane review, only one of seven treatment trials that reported cold duration showed a significant benefit[2]. A well-designed U.S. trial of 713 adults found a trend toward colds about half a day shorter with echinacea, but it wasn't statistically significant, and the authors concluded it didn't substantively change the course of a cold[4]. The 2019 meta-analysis also found no meaningful effect on duration[3].
Is echinacea safe? Who should avoid it?
Short-term use appears reasonably safe for most adults; the 2019 meta-analysis found no clear difference in adverse events versus placebo[3]. The most common side effects are digestive: stomach pain and nausea[1]. Some people have allergic reactions, which can be severe[1]. Because echinacea is related to ragweed and daisies[1], it's worth checking with your provider if you have plant allergies.
In a trial of echinacea for colds in children, it didn't help symptoms, and rash was more common in the echinacea group[5]. NCCIH notes concern that allergic reactions could be severe in some children[1]. There's also conflicting evidence on interactions with some drugs processed by the liver[1], so check with a pharmacist if you take regular medication.
The honest summary
- Echinacea may slightly reduce the chance of catching a cold.
- There's little evidence it shortens a cold once it starts.
- Products vary a lot, so results from one study may not apply to another product.
- Be cautious if you have plant allergies, and ask your pediatrician before giving it to children.
For how echinacea fits alongside vitamin C and zinc, see Vitamin C, Zinc & Echinacea: Building an Immune-Support Stack.
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Frequently asked questions
How long can you take echinacea?
Most studies are short-term, so less is known about long-term use. Ask your provider if you plan to take it for an extended period.
Is echinacea safe during pregnancy?
Evidence is limited. NCCIH says it's possibly safe for up to 7 days in the first trimester[1]. Ask your provider.
Can kids take echinacea?
A children's trial found no benefit and more rashes[5]. Talk to your pediatrician first.
Is echinacea better with zinc?
They're often combined, but there's little research on the pair specifically. Zinc lozenges have their own evidence for shortening colds[6]; see our colds guide.
Sources
- National Center for Complementary and Integrative Health. Echinacea. Accessed September 27, 2026. www.nccih.nih.gov/health/echinacea
- Karsch-Völk M, Barrett B, Kiefer D, Bauer R, et al. Echinacea for preventing and treating the common cold. Cochrane Database Syst Rev. 2014;CD000530. doi:10.1002/14651858.CD000530.pub3
- David S, Cunningham R. Echinacea for the prevention and treatment of upper respiratory tract infections: a systematic review and meta-analysis. Complement Ther Med. 2019;44:18-26. doi:10.1016/j.ctim.2019.03.011
- Barrett B, Brown R, Rakel D, Mundt M, et al. Echinacea for treating the common cold: a randomized controlled trial. Ann Intern Med. 2010;153:769-777. doi:10.7326/0003-4819-153-12-201012210-00003
- Taylor JA, Weber W, Standish L, Quinn H, et al. Efficacy and safety of echinacea in treating upper respiratory tract infections in children: a randomized controlled trial. JAMA. 2003;290(21):2824-2830. doi:10.1001/jama.290.21.2824
- Office of Dietary Supplements, National Institutes of Health. Zinc: Fact Sheet for Health Professionals. Updated January 6, 2026. ods.od.nih.gov/factsheets/Zinc-HealthProfessional/
About the Vita Globe Editorial Team
The Vita Globe Editorial Team researches and writes our wellness content, working from peer-reviewed research, systematic reviews and guidance from bodies such as the NIH and the FDA. We cite our sources inline and update articles when the evidence changes.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This article is for informational purposes only and is not a substitute for medical advice. Talk to your healthcare provider before starting any new supplement, particularly if you are pregnant, nursing, taking medication, or caring for a child.
