The 15 Best Natural Antibiotics (Foods & Herbs List)

By Meital James

✓Reviewed & Updated

Updated: Oct 7, 2026

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Do you remember your last experience with antibiotics?

Yikes.

That’s what originally made me curious about natural antibiotics and whether any foods, herbs, or natural products really have antibacterial effects.

Some do.

Garlic, oregano, honey, berberine-containing plants, thyme, and several other natural substances have shown antimicrobial activity in research.

But there’s an important difference between killing bacteria in a laboratory and actually treating a bacterial infection in a person.

In this guide, I’ve separated the natural antibiotics with the most interesting evidence from those whose reputation is based mainly on traditional use or laboratory studies.

You’ll also see what each one is best suited for, how I use the ones I keep at home, and where the evidence is still too weak to treat them as a replacement for medical care.

This post may contain affiliate links at no extra cost to you.

Do Natural Antibiotics Work?

Yes, some natural substances genuinely have antibacterial or antimicrobial properties.

Researchers have found plant compounds that can interfere with bacterial cell membranes, enzymes, biofilms, and other processes bacteria need to survive.

Honey also has well-documented antimicrobial properties, and medical-grade honey is used clinically for some types of wound care.

But the evidence varies enormously from one natural antibiotic to another.

Some have human clinical evidence for specific uses. Others have only been tested in laboratory or animal studies.

And something that kills bacteria in a petri dish does not automatically work as an antibiotic inside the human body.

That’s why I wouldn’t use the term “natural antibiotic” to mean “natural replacement for prescription antibiotics.”

Instead, I use it here for foods and herbs with documented antimicrobial activity, while showing you how strong the evidence actually is for each one.

Important: Prescription antibiotics can be lifesaving for bacterial infections such as strep throat, certain UTIs, pneumonia, and other serious infections. Natural remedies should not replace an antibiotic when one is medically necessary.

👉 In a Hurry? Start Here

• Best-supported topical use: Medical-grade honey for certain wounds
• Best for soothing a sore throat or cough: Honey
• Strongest lab antibacterial evidence: Oregano oil
• Best everyday kitchen ingredient: Garlic
• Interesting berberine-containing herbs: Goldenseal and Oregon grape, but human evidence for the herbs themselves is limited
• Best all-around pantry add-on: Coconut Oil

The Complete List of Natural Antibiotics

1. Oregano Oil

Evidence: Strong lab antimicrobial activity; limited human clinical evidence

Oregano oil is one of the more interesting natural antimicrobials because its main compounds, especially carvacrol and thymol, have shown activity against a wide range of bacteria in lab studies.

Researchers have found that oregano essential oil can inhibit both ordinary and antibiotic-resistant Staphylococcus strains, including MRSA.

More recent lab research has also found activity against several multidrug-resistant bacteria and bacterial biofilms.

Human clinical evidence is still limited.

Bottom line: Oregano oil has some of the strongest lab antibacterial evidence on this list, but we don’t yet have strong clinical trials showing that taking oregano oil can replace antibiotics for bacterial infections.

👉 How I Use Oregano Oil – I keep oregano oil at home because it is one of the natural antimicrobials I find most interesting, but I use it as a supplement rather than treating it like a replacement for prescription antibiotics.

If you use an oregano-oil supplement, follow the specific product directions because concentrations vary widely between brands.

What I use: Source Naturals Wellness Oil of Oregano

👉 See more great uses for oregano oil.

2. Manuka Honey

Best for: wound care with medical-grade honey, plus soothing coughs and sore throats

Manuka honey is one of the natural antibiotics on this list with the most convincing real-world medical use.

Like other honeys, it has antibacterial properties, but Manuka honey contains unusually high levels of methylglyoxal (MGO), a compound strongly linked to its antibacterial activity.

Lab studies show activity against a wide range of bacteria, including Staphylococcus aureus and MRSA.

More importantly, honey isn’t limited to petri-dish research. Sterile medical-grade honey dressings are actually used in wound care, including for some ulcers, burns, surgical wounds, and other difficult-to-heal wounds.

However:

Don’t put ordinary supermarket or edible Manuka honey on an open wound. Medical-grade honey is sterilized and prepared specifically for wound care.

What About Taking Manuka Honey Internally?

I wouldn’t describe eating Manuka honey as a way to treat a bacterial infection.

However, honey in general has good human evidence for soothing cough and upper-respiratory symptoms.

But if I already have a jar at home, a spoonful in tea or on its own is one of the simplest ways I use it for a sore throat or cough.

Bottom line: Medical-grade Manuka honey has a legitimate place in wound care, and Manuka itself has strong antibacterial activity. Eating it may soothe a cough or sore throat, but it has not been proven to work like an oral antibiotic inside the body.

What I use: Steens 100% Pure New Zealand Raw Manuka Honey

See how to make your own 100% natural sore throat spray (with essential oils, herbs, and honey!)

3. Goldenseal

Evidence: Interesting laboratory antibacterial activity, but limited human evidence

Goldenseal is one of those herbs that sounds especially promising because it contains berberine, a plant compound with antimicrobial activity.

And goldenseal itself has shown some impressive results in the lab.

In one study, goldenseal extract inhibited MRSA and also interfered with the bacteria’s communication system and toxin production.

Interestingly, the whole goldenseal extract was more effective against the bacteria than berberine alone, suggesting that other compounds in the plant may contribute to its activity.

However:

Goldenseal itself has not been shown in rigorous human trials to treat UTIs, respiratory infections, sore throats, or digestive infections.

How I Use Goldenseal – I prefer to think of goldenseal as a traditional herbal supplement rather than something I would rely on to treat a bacterial infection.

If you choose to use a goldenseal supplement, follow the product directions rather than trying to copy doses used for isolated berberine, since they are not interchangeable.

Goldenseal can also interact with medications, check with your doctor if you take prescription medication.

What I use: Nature’s Answer Goldenseal Extract

👉 See the top 3 natural antibiotics for a UTI here

4. Echinacea

Best for – Possible support for colds and respiratory infections.

Echinacea is often described as a natural antibiotic, but human research does not show that it can treat bacterial infections such as strep throat or bacterial sinus infections.

There is some interesting laboratory evidence. A standardized Echinacea purpurea extract killed several respiratory bacteria, including Streptococcus pyogenes and Haemophilus influenzae.

But this was an in-vitro study, so it does not prove echinacea works as an antibiotic inside the human body.

Human evidence is mainly about respiratory infections. However, several authors disclosed financial ties to an echinacea manufacturer.

How I Use Echinacea – I think of echinacea as possible short-term support during cold or respiratory symptoms, rather than as a replacement for antibiotics.

What I use – Herb Pharm Certified Organic Golden Echinacea

5. Coconut Oil

Best for – Topical skin support and promising antimicrobial activity

Coconut oil contains a high amount of lauric acid, which, along with its derivative monolaurin, has antibacterial, antifungal and antiviral activity in lab studies.

For example, virgin coconut oil inhibited several Candida species, including Candida albicans, in a lab study.

There is also some human evidence for topical use. In a small controlled trial of adults with eczema, applying virgin coconut oil significantly reduced Staphylococcus aureus colonization compared with olive oil.

How I Use Coconut Oil – it can be used as a food or moisturizer, but I would not use it orally or topically as a replacement for antibiotics or antifungal treatment.

What I use – Viva Naturals Organic Coconut Oil

6. Turmeric

Best for – Oral Candida and bacteria.

Turmeric, the bright yellow root, is far more than just a culinary spice.

It is one of the most thoroughly researched plants in the world, and for good reasons.

Its medicinal properties and components (primarily curcumin) have been the subject of thousands of peer-reviewed and published biomedical studies.

Turmeric gets called a “natural antibiotic” a lot, but the human evidence is strongest for curcumin used locally in the mouth, not for swallowing turmeric to treat an infection.

How I Use Turmeric – Turmeric root can be bought fresh and added to your green juice, soup, rice, potatoes, etc. You can also get organic Turmeric powder.

Another option is to take a high-quality Curcumin supplement.

You can use Turmeric as a topical paste to treat skin infections, acne, and muscle pain.

I simply make a paste by adding water (and some Manuka Honey) and applying it directly to the infected area.

7. Ginger

Best for – upper respiratory infections, nausea, gut infections, acid reflux, cancer, gas and bloating

Ginger is a culinary marvel, and its health benefits are stunning.

Ginger does a lot more than calm nausea. Its active compounds, especially gingerols, have shown antibacterial activity against several Gram-negative bacteria and oral pathogens.

In lab studies, gingerols inhibited bacteria linked to gum disease, including P. gingivalis and P. intermedia.

Ginger may also be interesting for H. pylori. Ginger extracts and gingerols inhibited 19 strains of the bacteria in lab testing.

In a small human pilot study, 8 of 15 people with H. pylori tested negative after taking 3 grams of ginger daily for four weeks.

There’s also human research suggesting ginger can help with other digestive problems. In a randomized trial, 2 grams a day improved disease activity and quality of life in people with ulcerative colitis.

Ginger compounds have also killed cancer cells and reduced brain inflammation in laboratory and animal studies, but those effects have not been proven as treatments in people.

How I Use Ginger Root – Fresh ginger root can be added to anything from your green juice to any food you cook. You can add a thumb-sized piece to your juice.

Alternatively, you can use organic Ginger powder (1 tbsp in water) or take it in the form of a supplement.

8. Garlic

Best for – An everyday food with strong laboratory antimicrobial activity.

Garlic is one natural remedy that actually has some solid science behind its reputation.

Its best-known compound, allicin, has antibacterial activity against bacteria including E. coli and even antibiotic-resistant MRSA in lab studies (This study found allicin inhibited all 30 MRSA isolates tested).

But these are lab studies.

There is some human evidence for colds. One trial found that an allicin-containing garlic supplement reduced the number of colds over 12 weeks.

How I Use Garlic – I simply use garlic regularly in food. There isn’t an established dose for treating infections.

9. Horseradish

Best for – Recurrent UTIs and respiratory infections.

Horseradish isn’t just a traditional remedy. It actually has some pretty interesting human research behind it, especially when combined with nasturtium.

In a 2026 randomized trial of 217 women with recurrent cystitis, a horseradish-and-nasturtium supplement reduced the risk of another UTI by 36% over six months compared with placebo.

The same combination has also been tested for respiratory infections.

In a randomized trial of 351 adults, the higher-dose group had about half as many respiratory infections as the placebo group during treatment.

How I Use It – a horseradish and nasturtium supplement.

What I use – Salus Alpenkraft Nasturtium Horseradish Capsules

10. Myrrh

Best for – Mouth and skin use, with promising antimicrobial activity

If you’ve heard of frankincense and myrrh, it’s probably thanks to the biblical account of the birth of Jesus.

…and when they had opened their treasures, they presented unto him gifts; gold, and frankincense, and myrrh

-(Matthew 2:11).

Myrrh is a reddish resin that comes from species of the genus Commiphora, which are native to northeast Africa and the adjacent areas of the Arabian Peninsula.

Myrrh has been used for centuries for wounds and mouth problems, and there is some science behind it.

In lab studies, compounds from myrrh have shown antibacterial and antifungal activity against bacteria including E. coli, Staphylococcus aureus and Pseudomonas aeruginosa, as well as Candida albicans.

There is also a little human evidence. In one small trial, a myrrh mouthwash helped wounds heal faster after tooth extraction.

How I Use Myrrh – Myrrh can be taken internally (as an extract) and used externally as a mouthwash for wounds.

11. Thyme

Best for – Oral bacteria and Candida, with additional evidence for cough

Thyme is one of the more interesting herbs on this list because its antimicrobial effects have actually been tested in people, not just in the lab.

In one clinical trial, a 2% thyme essential-oil spray significantly reduced Candida albicans on removable orthodontic appliances after just five days, with results similar to chlorhexidine.

Thyme also appears to have antibacterial effects in the mouth. In a human experiment, thyme extract reduced the ability of Streptococcus mutans, one of the main bacteria involved in tooth decay, to stick to cells inside the mouth.

How I use it – in mouthwash and topical applications.

12. Olive Leaf

Best for – Cold sores and respiratory infections

In the Middle East, olive leaf tea has been used for centuries to treat sore throat, coughs, fevers, high blood pressure, cystitis (bladder infection), gout (foot inflammation), and to improve general health.

But the most interesting human research is actually on cold sores and respiratory infections.

In a randomized trial, a 2% olive leaf cream worked about as well as acyclovir for cold sores, with less pain and itching in the olive leaf group.

Olive leaf has also shown antibacterial activity against H. pylori, MRSA, and Campylobacter in the lab.

How I Use It – Olive leaf supplements.

What I use – Nature’s Answer Oleopein Olive Leaf

13. Cabbage

Best for – Stomach ulcer support.

Cabbage may sound like an odd addition to a natural-antibiotics list, but it actually has some surprisingly interesting human research behind it.

In an early study, 13 people with peptic ulcers who drank fresh cabbage juice had their ulcers heal in an average of about 7 to 10 days

Cabbage has been proven to have antimicrobial properties that can kill all kinds of diseases naturally.

Cabbage also has antibacterial activity against bacteria such as E. coli, Salmonella, and Listeria in lab studies.

How I use it – Raw, juiced, or fermented cabbage is easy to add to your diet.

Here’s how to easily make organic fermented cabbage (natural antibiotic AND probiotic!):

14. Lemons & Limes

Best for – stomach infections and upper respiratory infections.

Several studies have found the antibacterial properties of lemons.

Data published in the British Journal of Pharmacology and Toxicology reveal:

Lemons contain both coumarin and tetrazine, both effective against many pathogens.

Limes have potent antibacterial activity against multiple drug-resistant E. coli.

I use them inside my DIY vitamin C recipe!

15. Oregon Grape

Best for – digestive infections, stomach ulcers, GERD, bowel cleanse, psoriasis (topically).

Like Goldenseal, the Oregon Grape contains berberine, which can stop bacteria from adhering to the walls of the intestine and urinary tract.

Oregon Grape can be a great antibiotic alternative for UTIs and digestive tract conditions like infectious diarrhea.

How I Use Lemons and Limes – Gargling lemon juice whenever I feel a sore throat coming – stops it dead in its tracks. Use lemons and limes raw only to get the benefits. You can squeeze up to 3 lemons and drink them to treat colds, the flu, sinusitis, or any upper respiratory problem.

The Strongest Natural Antibiotic

I know it would be much simpler if I just told you which one of these natural antibiotics is the strongest, but unfortunately, it doesn’t work like that.

We are different.

What works for one person may not work as well for another. You’ll have to try a few of them and see which one works best for you.

For me, the most effective natural antibiotic is Oregano oil. I use it all the time.

Now that you have your complete list of natural antibiotics, you can safely treat your bacterial infections with the help of nature’s pharmacy – without side effects, without harming your gut microflora, and without spending so much money on antibiotics.

But:

Before you use any of these top natural antibiotics, please consult your doctor to make sure they are safe for you, especially if you take any medication.

What about you? Have you ever tried one of these natural antibiotics? Which one works best in your experience?

To your health and happiness,

Meital

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