Natural Antibiotics: What the Evidence Shows

No natural product has been shown to replace a prescription antibiotic for a bacterial infection. The best human evidence is for honey on burns and coughs^{1, 2} and cranberry for preventing urinary tract infections³. Garlic, echinacea and oregano oil have little or no proof of treating infections^{4, 5}.

Some herbs do kill bacteria in a dish, but a lab result does not show that a product treats an infection in people. For the wider picture on preventing bacterial infections, see our evidence page.

A natural antibiotic is any plant, food or animal product claimed to kill bacteria. Many do slow bacteria in a dish. One example is "Amish amoxicillin", a homemade blend of onion, garlic, ginger, turmeric, lemon, apple cider vinegar, honey and cayenne. In a lab study it slowed the growth of staph bacteria, mainly because of the garlic and vinegar, but the authors found no evidence to support using it instead of standard treatment⁶. Far fewer products have been tested against a real infection in people.

Here is how the common claims rank by human evidence:

• Moderate, for a narrow use: honey for burns and acute cough^{1, 2}, and cranberry for preventing UTIs³.
• Limited: echinacea for preventing colds⁷, and tea tree oil on the skin or gums⁸.
• Preliminary or none: garlic for colds⁴ and oregano oil^{5, 9}.
• Tested and not shown to work: d-mannose for preventing repeat UTIs¹⁰.

Colds and flu are caused by viruses, which antibiotics do not treat¹¹, so a cold trial cannot show that a product works like an antibiotic. The strongest natural antibiotic, if the question is how much it can do for an established infection, is none of these. Trials that compare a natural product with a prescription antibiotic head to head are rare, and the products above were mostly tested for prevention or symptom relief.

Garlic is not a proven antibiotic in people. A Cochrane review of garlic for the common cold found only one trial that met its standards⁴.

That trial gave 146 people a garlic supplement with 180 mg of allicin, or a placebo, daily for 12 weeks. The garlic group had 24 colds against 65 in the placebo group, but once ill, they recovered in about the same time (4.63 versus 5.63 days)⁴. The episodes were self-reported, and one trial is too little to base advice on⁴.

The US National Center for Complementary and Integrative Health says no strong evidence shows that garlic on its own prevents or treats colds⁵. Garlic supplements appear safe for most adults, with breath and body odor, heartburn and an upset stomach the usual side effects⁵. They may increase the risk of bleeding, which matters if you take a blood thinner or aspirin or are having surgery, and they may not be safe in pregnancy or while breastfeeding¹². Fresh raw garlic on the skin can cause severe irritation and chemical burns¹².

Eating garlic is fine, and our page on garlic extract covers the trials in other areas. Do not use it in place of treatment for an infection.

Honey has the best evidence of any natural remedy here, but mainly for burns and coughs, not for infections inside the body. A Cochrane review included 26 trials of honey on wounds in 3,011 people¹.

• Partial-thickness burns: high-quality evidence from 2 trials (992 people) that honey dressings healed burns 4.68 days faster than conventional dressings¹.
• Burns versus silver sulfadiazine: no difference in healing within 6 weeks (6 trials, 462 people)¹.
• Infected wounds after surgery: in one trial of 50 people, honey healed them faster than antiseptic washes and gauze, with fewer side effects (moderate-quality evidence)¹.
• Venous leg ulcers, diabetic foot ulcers and minor wounds: effects unclear¹.

The reviewers called the overall evidence heterogeneous and mostly low quality¹. That answers a common question, how to heal wounds faster naturally: honey dressings help partial-thickness burns, one trial supports them for infected surgical wounds, and little else is proven. First aid for a burn is still cool running water for 20 minutes, and a burn that is very large or deep, on the face or genitals, or caused by chemicals or electricity needs emergency care¹³. For the wider picture, see our pages on wound healing and slow wound healing.

Does honey help a cough or sore throat?

It probably eases a cough in children over 1 year old. A Cochrane review of 6 trials in 899 children found honey probably reduced cough better than no treatment (mean difference -1.05 on a 7-point scale) or placebo (-1.62)². It may work about as well as the cough medicine dextromethorphan, and the benefit faded after about 3 days². Most children in the trials took honey for only one night².

A 2021 meta-analysis of 14 studies in upper respiratory infections found honey beat usual care for cough frequency and severity, but the placebo-controlled data were inconclusive¹⁴. Honey eases symptoms. It has not been shown to clear an infection.

Cranberry can lower the chance of a repeat UTI, but it is not a treatment for an active one. The 2023 Cochrane review included 50 studies and 8,857 people³.

• Overall: cranberry products cut the risk of symptomatic, culture-verified UTIs (risk ratio 0.70, 26 studies, moderate-certainty evidence)³.
• Women with recurrent UTIs: risk ratio 0.74 across 8 studies of 1,555 women³.
• Not supported: older adults, people who cannot empty the bladder, and pregnant women³.
• Side effects: stomach and gut side effects probably did not differ from placebo or no treatment (10 studies)³.

D-mannose, a sugar sold for UTIs, did worse. In a UK trial of 598 women with recurrent UTIs, 2 g daily for 6 months gave a UTI contact rate of 51.0% against 55.7% on placebo, a difference that could be chance (P = .26)¹⁰. The authors concluded it should not be recommended for prevention in this group¹⁰.

Cranberry does not treat a UTI that has already started and should not replace proven treatment^{15, 16}, so if you already have burning or urgency, see a clinician. Get help urgently for a UTI in a child or during pregnancy, or one that comes with a high temperature, shivering or pain in your back just under the ribs, which can be signs of a kidney infection¹⁵. If you take the blood thinner warfarin, the NHS advises avoiding cranberry products¹⁵.

Our pages on UTIs and cranberry extract cover the rest, including probiotics for UTIs.

Echinacea may slightly lower the odds of catching a respiratory infection, but it has not been shown to shorten one. A 2019 meta-analysis found a risk ratio of 0.78 for prevention and no clear effect on how long infections lasted⁷. The authors doubted the prevention effect was clinically meaningful, and the products tested varied widely⁷. Some people have allergic reactions to echinacea, which may be severe, so check with a clinician before giving it to a child¹⁷. See echinacea for the full evidence.

Oregano oil is widely sold as a "natural antibiotic", but it has almost no human data. Carvacrol, a compound in oregano oil, kills bacteria in lab studies, but a 2018 review noted that human trials are lacking⁹. NIH finds no strong evidence that oil of oregano prevents or treats colds⁵.

Tea tree oil has more trials, mostly for topical and dental use. A systematic review of 46 articles found that mouthwash at 0.2% to 0.5% may limit dental plaque, and a 5% gel may help gum disease alongside standard cleaning⁸. Topical regimens cleared MRSA carriage, meaning the bacteria living on the body without causing an infection, about as well as standard treatment, but the overall research quality was poor to modest⁸. Side effects appeared in 60% of the studies and were minor, except at concentrations of 25% or more⁸.

Never swallow tea tree oil, including mouthwash that contains it: taken by mouth, it can cause confusion, unsteadiness and coma¹⁸.

For related pages, see propolis for sore throat and oral health.

Antibiotics are the right tool when a clinician confirms a bacterial infection that will not clear without them, or one that could spread. Many respiratory infections do clear without them: a Cochrane review of 12 trials in 3,968 people found no differences in cough outcomes between immediate, delayed or no antibiotics¹⁹.

Immediate antibiotics modestly improved symptoms of ear infections and sore throat. The trials found no difference in complication rates, but that evidence was of low certainty, and every patient had been seen in a clinic or emergency department¹⁹. Strep throat is one to have checked: a quick test can confirm it, clinicians treat it with antibiotics, and it can lead to complications such as abscesses and rheumatic fever if the bacteria spread²⁰.

What about a tooth infection?

A dental abscess needs urgent treatment by a dentist and will not go away on its own²¹. Signs include intense toothache, a swollen face or jaw and a high temperature²¹. Treatment means draining the pus, and sometimes a root canal or removing the tooth, with antibiotics sometimes added²¹. Clove, oregano and garlic remedies do not replace that. Get emergency care if you find it hard to breathe, speak or swallow, or have a swollen or painful eye²¹.

How do you beat a bacterial infection without antibiotics?

For a mild infection that your clinician agrees is safe to watch, rest, fluids and pain relief can ease symptoms while you wait, as the NHS advises for a mild UTI¹⁵. The delayed-prescription approach is one tested middle path: in the Cochrane review it cut antibiotic use to 30% of patients, compared with 93% given them immediately¹⁹. No antibiotics with advice to return if symptoms persist cut use further, to 13% against 27% for delayed prescriptions¹⁹.

Do not try to "flush out" or "draw out" an infection with home remedies. We found no trial showing that any natural product does that for a bacterial infection.

Because resistance and untreated infection both carry real costs. The CDC counts more than 2.8 million antimicrobial-resistant infections and more than 35,000 deaths in the US each year²². It also warns that too many antibiotics are used unnecessarily¹¹, which is part of why natural alternatives appeal for mild illness.

The same logic cuts the other way. A natural product that has never been shown to treat an infection can delay care for one that needs it. Use natural remedies for what the trials support, such as honey for a cough, and keep antibiotics for bacterial infections a clinician has confirmed.

No supplement has been shown to replace amoxicillin. Honey should not be given to infants under 12 months because it may cause a severe food poisoning called botulism²³. Fish antibiotics sold in pet stores or online, such as fish amoxicillin, are unapproved and may be improperly made or labeled, and the FDA says people should never take animal drugs, some of which can cause serious harm²⁴.

Low risk is not the same as effective, and several products here carry specific risks: garlic supplements and bleeding, cranberry with warfarin, tea tree oil if swallowed, and allergic reactions to echinacea. If you take prescription medicines, ask a pharmacist before adding herbs, because some herbs and medicines interact in harmful ways¹².

Use a simple decision rule:

• Cough or mild cold: honey is a reasonable choice for anyone over 12 months^{2, 23}.
• Recurrent UTIs: ask your clinician about cranberry for prevention³, and skip d-mannose¹⁰.
• Burn or wound: honey dressings have trial support for partial-thickness burns, so ask a clinician whether they suit yours¹. Skin that turns painful, hot and swollen needs an urgent appointment, because it can be cellulitis, which is treated with antibiotics²⁵.
• Tooth pain with swelling, strep symptoms or ear pain: see a clinician or dentist^{21, 20, 19}.
• Frequent infections: look for the cause with a clinician. Our page on recurring infections is a start.

Supplements in this guide

• Garlic Extract
• Echinacea
• Cranberry Extract
• Propolis
• Probiotics

We searched PubMed and the Cochrane Library for systematic reviews and randomized trials on garlic, honey, cranberry, d-mannose, echinacea, oregano oil, tea tree oil and delayed antibiotic prescribing. We also read pages from the CDC, FDA, NHS and NCCIH, including their safety and when-to-get-help advice, and a lab study of the "Amish amoxicillin" home remedy. We read 25 sources in full or in abstract and cited all of them. We prioritized meta-analyses and trials in people. Most herbs have no head-to-head trials against antibiotics, so this guide cannot say how they compare in an established infection. Researched on 14 October 2026.

1. Jull AB, et al. Honey as a topical treatment for wounds. Cochrane Database Syst Rev. 2015;2015(3):CD005083. doi:10.1002/14651858.CD005083.pub4
2. Oduwole O, et al. Honey for acute cough in children. Cochrane Database Syst Rev. 2018;4(4):CD007094. doi:10.1002/14651858.CD007094.pub5 Our study summary.
3. Williams G, et al. Cranberries for preventing urinary tract infections. Cochrane Database Syst Rev. 2023;4(4):CD001321. doi:10.1002/14651858.CD001321.pub6 Our study summary.
4. Lissiman E, et al. Garlic for the common cold. Cochrane Database Syst Rev. 2014;2014(11):CD006206. doi:10.1002/14651858.CD006206.pub4 Our study summary.
5. National Center for Complementary and Integrative Health. Travel-Related Ailments and Complementary Health Approaches: What the Science Says (colds and flu). https://www.nccih.nih.gov/health/providers/digest/travel-related-ailments-and-complementary-health-approaches-science
6. Decker MM, et al. Antimicrobial Effects of the Folk Remedy "Amish Amoxicillin" Against Staphylococcus aureus. MicroPubl Biol. 2025;2025. doi:10.17912/micropub.biology.001753
7. David S, et al. 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
8. Kairey L, et al. Efficacy and safety of Melaleuca alternifolia (tea tree) oil for human health-A systematic review of randomized controlled trials. Front Pharmacol. 2023;14:1116077. doi:10.3389/fphar.2023.1116077
9. Sharifi-Rad M, et al. Carvacrol and human health: A comprehensive review. Phytother Res. 2018;32(9):1675-1687. doi:10.1002/ptr.6103
10. Hayward G, et al. d-Mannose for Prevention of Recurrent Urinary Tract Infection Among Women: A Randomized Clinical Trial. JAMA Intern Med. 2024;184(6):619-628. doi:10.1001/jamainternmed.2024.0264 Our study summary.
11. Centers for Disease Control and Prevention. Antibiotic Use and Antimicrobial Resistance Facts. https://www.cdc.gov/antibiotic-use/data-research/facts-stats/index.html
12. National Center for Complementary and Integrative Health. Garlic: Usefulness and Safety. https://www.nccih.nih.gov/health/garlic
13. National Health Service (UK). Burns and scalds. https://www.nhs.uk/conditions/burns-and-scalds/
14. Abuelgasim H, et al. Effectiveness of honey for symptomatic relief in upper respiratory tract infections: a systematic review and meta-analysis. BMJ Evid Based Med. 2021;26(2):57-64. doi:10.1136/bmjebm-2020-111336
15. National Health Service (UK). Urinary tract infections (UTIs). https://www.nhs.uk/conditions/urinary-tract-infections-utis/
16. National Center for Complementary and Integrative Health. Cranberry: Usefulness and Safety. https://www.nccih.nih.gov/health/cranberry
17. National Center for Complementary and Integrative Health. Echinacea: Usefulness and Safety. https://www.nccih.nih.gov/health/echinacea
18. National Center for Complementary and Integrative Health. Tea Tree Oil: Usefulness and Safety. https://www.nccih.nih.gov/health/tea-tree-oil
19. Spurling GK, et al. Immediate versus delayed versus no antibiotics for respiratory infections. Cochrane Database Syst Rev. 2023;10(10):CD004417. doi:10.1002/14651858.CD004417.pub6
20. Centers for Disease Control and Prevention. About Strep Throat. https://www.cdc.gov/group-a-strep/about/strep-throat.html
21. National Health Service (UK). Dental abscess. https://www.nhs.uk/conditions/dental-abscess/
22. Centers for Disease Control and Prevention. 2019 Antibiotic Resistance Threats Report. https://www.cdc.gov/antimicrobial-resistance/data-research/threats/index.html
23. Centers for Disease Control and Prevention. Foods and Drinks to Avoid or Limit (Infant and Toddler Nutrition). https://www.cdc.gov/infant-toddler-nutrition/foods-and-drinks/foods-and-drinks-to-avoid-or-limit.html
24. U.S. Food and Drug Administration. Ornamental Fish Drugs and You. https://www.fda.gov/animal-veterinary/animal-health-literacy/ornamental-fish-drugs-and-you
25. National Health Service (UK). Cellulitis. https://www.nhs.uk/conditions/cellulitis/