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An assortment of spices and herbs, including star anise, nutmeg, bay leaves, dried flowers, coarse salt, and various ground and whole spices, arranged in a visually pleasing manner on a flat surface.

Understanding Antimicrobial Foods

For individuals struggling with chronic gut issues, antimicrobial foods provide a valuable foundation for restoring balance. They help reduce harmful microbes, protect the gut lining, and encourage the growth of beneficial bacteria necessary for a healthy microbiome. This contributes to symptom relief, better digestion, and long-term healing.

A Case for Natural Compounds Over Chemical Drugs

The growing prevalence of life-threatening bacterial, fungal, and viral infections, coupled with the alarming ability of these pathogens to develop resistance to pharmaceutical drugs, underscores the urgent need for alternative strategies to combat these threats.

The World Health Organization (WHO) expects the ‘post-antibiotic’ era to occur around the year 2050 after evaluating data from 129 countries; every region of the world showed extensive resistance to antimicrobial agents (Kwon et al., 2021), (Oliveira et al., 2024).

Pharmaceutical treatments, while widely used, often come with significant drawbacks, including toxicity, diminishing efficacy due to resistance, and collateral damage to beneficial microorganisms. In light of these challenges, natural compounds emerge as a superior and more sustainable solution.

Medieval illustration of two individuals harvesting garlic near a tree. One person stands holding garlic, while the other kneels to pick more from the ground. Lush greenery surrounds them.

Medicinal Plants Were Once Traditional Medicine

Did you know that more than 1,300 plants have been identified with proven antimicrobial properties, and over 30,000 antimicrobial compounds have been extracted from plants? (Tajkarimi et al., 2010).

Additionally, research estimates that between 14% and 28% of all plant species possess medicinal properties. An impressive 74% of all known bio-active plant-derived compounds being discovered through traditional knowledge and use, at times dating back thousands of years (Pandey et al., 2014).

Traditional medicine is defined as follows: “The sum of the total knowledge, skills, and practices based on the theories, beliefs, and experiences indigenous to different cultures, used in the maintenance of health as well as in the prevention, diagnosis, improvement, or treatment of physical and mental illness” (Anwar et al., 2024).

Today with modernisation and urbanisation, most of our earliest knowledge into plants and healing has already been lost unfortunately. With today’s enormous health-care challenges, natural compounds emerge logically as the superior and more sustainable solution to relieve human suffering.

The Safe And Effective Way To Keep Our Gut Clean And Balanced

Person in a yellow sweater and jeans with a graphical insert showing bacteria, implying a focus on gut health or microbiology.

For centuries, antimicrobial foods have been treasured for their ability to naturally combat harmful microorganisms. These foods offer a safe and effective way to promote health and manage a variety of conditions, including Candida overgrowth, SIBO, IBS, and inflammatory bowel disease (ulcerative colitis).

By including these key cleansing spices, herbs, and condiments in your diet, you not only support your gut health but also enhance your immune system and overall well-being.

Natural Compounds, Not Synthetic Drugs

Antimicrobial foods contain natural compounds, not chemical drugs, such as allicin, eugenol, caprylic acid, lauric acid, and polyphenols, which inhibit or kill bacteria, viruses, fungi, and other pathogens.

Unlike pharmaceutical antibiotics, which often act as a broad-spectrum weapon, indiscriminately destroying both harmful pathogens and beneficial bacteria, antimicrobial foods, including spices and herbs, offer a much more refined and selective approach.

Antibiotics can significantly disrupt the delicate balance of the gut microbiome, often leading to unintended consequences such as dysbiosis, weakened immunity, or even secondary infections like Candida overgrowth. In contrast, antimicrobial foods contain natural compounds that target harmful microorganisms more specifically, leaving beneficial bacteria relatively unharmed.

Selective Action

This selective action is particularly valuable for maintaining a healthy gut environment, as the beneficial microbes in the gut play a critical role in digestion, nutrient absorption, immune modulation, and the production of essential compounds like short-chain fatty acids.

By preserving this balance, antimicrobial foods not only help manage infections and overgrowths such as Candida or SIBO but also support the long-term health and resilience of the gut microbiome. Furthermore, because they are derived from natural sources, antimicrobial foods are unlikely to contribute to antibiotic resistance, making them a safer and more sustainable choice for managing gut imbalances over time.

The benefits of antimicrobial foods include:

By incorporating these foods into your daily diet, you can strengthen your gut’s defenses while addressing specific conditions like dysbiosis, ulcerative colitis, and bacterial or fungal infections.

Why Natural Compounds Are The Intelligent Choice

A diagram categorizes sulfur compounds in garlic: water-soluble (alliin, cysteine, SAC, SAMC) and oil-soluble (allicin, DAS, DADS, DATS, ajoene).

Derived from animal, plant, or microbial sources, natural compounds offer a unique combination of low toxicity, targeted activity, and high bioavailability, making them ideal candidates for combating harmful pathogens.

Recent advancements in research have highlighted the incredible potential of various natural compounds, including plant extracts, essential oils, small antimicrobial peptides from animal sources, bacteriocins, and a range of plant-derived compounds such as triterpenoids, alkaloids, phenols, and flavonoids (Woo et al., 2023).

These natural agents not only exhibit strong inhibitory activity against bacteria, fungi, and viruses but also possess unique mechanisms of action that reduce the likelihood of resistance development (Karnwal et al., 2024).

Unlike pharmaceutical drugs, which frequently disrupt the delicate balance of the microbiome and contribute to resistance, natural substances often work in harmony with the body, providing potent antimicrobial, antifungal, and antiviral effects without the associated long-term risks.

How Natural Compounds Work

Natural compounds excel in their ability to target pathogens selectively without harming beneficial microorganisms. For example, phenolic compounds found in many colourful vegetables and fruits disrupt pathogen cell membranes, while flavonoids interfere with microbial enzyme systems, rendering bacteria and fungi helpless (Lobiuc et al., 2024).

Essential oils and antimicrobial peptides in many plants further enhance this approach by attacking pathogens on multiple fronts, making resistance development far less likely (Chouhan et al., 2017).

In addition, many natural compounds also positively influence our immune system, supporting the body’s innate ability to heal and combat infections. This dual action—directly targeting pathogens and boosting immunity—makes natural compounds considerably more effective and holistic compared to the single-target mechanisms of pharmaceutical drugs (Gasmi et al., 2023), (Mahmud et al., 2023).

Polyphenols Have Antimicrobial Properties

A pile of assorted berries including strawberries, blueberries, raspberries, blackberries, and small red berries against a white background.

Polyphenols, plant-derived nutrients, play a crucial role in reducing oxidative stress and controlling inflammation within the body. Acting as potent antioxidants, they neutralise free radicals—unstable molecules that can harm cells and contribute to chronic diseases like diabetes, heart disease, and cancer.

These compounds are abundant in vibrant, colorful foods such as fruits, vegetables, tea, coffee, and dark chocolate. Beyond their protective role, they also give these foods their vivid colors and are often accompanied by essential nutrients like fiber, vitamins, and minerals, making plants a cornerstone of health and disease prevention.

Polyphenols are intricate plant-based phytochemicals present in a wide range of foods, particularly fruits and vegetables. They belong to a diverse family of naturally occurring compounds in plants, categorized into four main groups: flavonoidsphenolic acidslignans, and stilbenes, ranging from simple molecules to complex polymers.

Article of Interest: Polyphenol Rich Foods

Let’s look a little more into the antimicrobial properties of polyphenols:

  • Bacterial Inhibition:
  • Polyphenols have successfully demonstrated a variety of antimicrobial properties against a variety of bacteria, including both gram-positive and gram-negative species. By  bacterial cell membranes or interfering with various vital cellular functions, they can halt the growth of bacteria. (Manso 2022)
  • Antifungal activity:
  • Polyphenols have demonstrated antifungal activity against a range of fungi, including species of Candida. They can interfere and destroy fungal cell membranes, thereby preventing the growth of fungal colonies. Due to a lack of treatment options available for infections caused by multidrug-resistant Candida auris, research has found a phenolic compound to show effectiveness.
  • Studies have indicated ellagic acid to be a promising antifungal agent, by inhibiting fungal growth and virulence traits, including phospholipase secretion and fungal adhesion to cell surfaces. (Rossatto 2021). The best dietary sources of ellagic acid include strawberries, raspberries, blackberries, cherries, and walnuts.
  • Natural Food Preservatives:
  • Polyphenols have the potential to serve as natural preservatives in the food industry by preventing the growth of bacteria and fungi that cause spoilage, thus extending the shelf life of products. (Ullah 2022)
  • Dental Health:
  • Researchers are looking into the possibility that polyphenols, which are present in tea and cranberries, can help with oral infections and stop dental plaque from forming. (Philip 2019)
A male medical professional in blue scrubs and wearing glasses appears thoughtful, resting his chin on his hand, with a stethoscope around his neck.

A Sustainable Future in Antimicrobial Treatments

As drug-resistant pathogens continue to threaten public health, it is important to prioritise natural compounds as a primary strategy for managing bacterial, fungal, and viral infections.

These substances not only offer a safer alternative to synthetic drugs but also contribute to ecological balance by reducing reliance on harmful pharmaceuticals.

By harnessing nature’s vast repository of antimicrobial agents, we can address bacterial, fungal, and viral infections effectively while preserving overall health and microbial harmony.

Natural compounds represent the future of sustainable, effective, and safe antimicrobial treatment, providing a path forward that aligns with both human health and the environment. Let’s take a look at some of the best antimicrobial foods, and then check out a basic antimicrobial one-week menu plan.

Top Antimicrobial Foods to Support Gut Health

Below are eight powerful antimicrobial foods. Each offers unique health benefits and plays a significant role in promoting gut balance and fighting harmful microorganisms.

  • Apple Cider Vinegar
  • ACV contains acetic acid, which has natural antimicrobial properties that combat Candida and harmful bacteria. Consuming diluted ACV before meals can improve digestive enzyme activity, regulate stomach pH, and enhance gut health.
  • Cinnamon
  • Cinnamon contains cinnamaldehyde, a compound with antifungal and antibacterial effects. It helps manage Candida overgrowth and supports a balanced microbiome. Cinnamon is easy to incorporate into your diet by adding it to teas, smoothies, or baked goods.
  • Cloves
  • Clove is a spice packed with eugenol, a powerful antifungal and antibacterial compound. Eugenol helps reduce pathogenic loads in the gut and is particularly effective in anti-Candida and antimicrobial protocols. Ground cloves or clove oil can be incorporated into recipes or taken as a supplement.
  • Coconut Oil
  • Rich in lauric acid and caprylic acid, coconut oil is a potent antifungal and antiviral agent. It is particularly effective against Candida overgrowth and harmful gut bacteria. Regular use of coconut oil in cooking or as a supplement can reduce pathogenic microbes and support a healthier microbiome
  • Garlic
  • Garlic is a well-known natural antibiotic and antifungal food due to its active compound, allicin. Allicin has been shown to combat Candida albicans and harmful gut bacteria while leaving beneficial microbes intact. Adding fresh garlic to your meals can also boost immune function and improve gut resilience.
  • Ginger
  • Ginger contains gingerol and shogaol, compounds known for their anti-inflammatory and antimicrobial properties. These compounds help fight gut pathogens while soothing digestive discomfort, such as bloating or nausea. Ginger tea or fresh ginger in meals can be a daily gut-friendly addition.
  • Lemongrass
  • Lemongrass oil and lemongrass extracts are widely recognised for their potent antimicrobial properties, effectively combating a variety of harmful microbes, including Escherichia coli, Klebsiella pneumoniae, Candida albicans, and Staphylococcus aureus.
  • Oregano
  • Oregano oil is a powerhouse of natural antimicrobials, containing carvacrol and thymol. These compounds target a wide range of bacteria, fungi, and even parasites. A few drops of oregano oil diluted in water or a carrier oil can be a potent remedy for gut-related infections.
  • Turmeric
  • Curcumin, the active ingredient in turmeric, has potent antimicrobial and anti-inflammatory effects. It helps balance the gut microbiome and promotes the repair of the gut lining. Turmeric is best absorbed when combined with black pepper, making it an excellent addition to meals, smoothies, or teas

Yeastrix Candida Cleanse: Antimicrobial Solution

For those looking for an all-in-one solution to tackle Candida and other fungal or bacterial infections, consider Yeastrix Cleanse, our 3rd generation antifungal supplement. This product combines 14 powerful antifungals, creating a balanced and effective cleanse for yeast and bacterial overgrowth.

Yeastrix Candida Cleanse includes:

With Yeastrix Candida Cleanse, you can simplify your antifungal regimen by getting the benefits of cinnamon along with other natural ingredients that promote gut health and combat yeast infections. Made with the highest-quality, non-GMO, and vegetarian ingredients, it’s designed for those looking for a natural, safe, and effective approach to Candida management.

Key Take-Aways

  • Antimicrobial foods offer a natural way to combat harmful microorganisms while supporting beneficial gut bacteria.
  • These foods help address gut imbalances related to Candida, SIBO, IBS, and IBD.
  • Garlic, coconut oil, ginger, lemongrass, clove, turmeric, ACV, oregano oil, and cinnamon are some of the most effective antimicrobial options.
  • Each food contains unique compounds that target specific pathogens and promote gut health.
  • Incorporating antimicrobial foods regularly can improve digestion, reduce inflammation, and boost immune resilience.

By making antimicrobial foods a staple in your diet, you can naturally support your gut and overall health.

A person gestures to decline a plate of hamburger and potato wedges being offered to them.

The Key Principles of the Antimicrobial Diet

The Antimicrobial Diet is centered on using natural, wholesome foods and specific ingredients to reduce harmful microbes in the gut while supporting the growth of beneficial bacteria.

It focuses on incorporating fresh, nutrient-dense vegetables, low-sugar fruits, healthy fats, and high-quality proteins to starve pathogens of their fuel sources while nourishing the body. Key antimicrobial foods like garlic, oregano, coconut oil, and ginger are emphasised for their powerful properties in disrupting microbial growth.

Avoiding ultra-processed foods, added sugars, and inflammatory ingredients is crucial to create an environment where the gut can restore balance.

By combining these principles with proper hydration and consistent meal patterns, the Antimicrobial Diet helps to restore gut harmony and optimise overall health.

  • Eliminate Gut Irritants
  • Remove sugar, refined carbohydrates, gluten, alcohol, and processed foods, as they can fuel harmful bacteria and yeast overgrowth.
  • Avoid inflammatory foods, including dairy (for sensitive individuals), artificial sweeteners, and additives. Consume anti-inflammatory foods.
  • Focus on Antimicrobial Foods
  • Incorporate foods that contain natural antimicrobials like cinnamon, garlic, cloves, coconut oil, ginger, and oregano. These target harmful pathogens while supporting beneficial microbes.
  • Support Digestive Function
  • Include foods that promote digestive enzyme activity and stomach acid production, such as apple cider vinegar and lemon water. Try my ACV Digestive shot.
  • Consume small, frequent meals to reduce the fermentation of food in the gut.
  • Promote Gut Healing
  • Add gut-healing foods like bone broth, gelatin, and omega-3-rich foods to repair the gut lining.
  • Incorporate anti-inflammatory foods such as turmeric, leafy greens, and berries.
  • Repopulate with Probiotics and Probiotic-Rich Foods
  • After reducing the pathogenic load, introduce probiotic-rich foods (e.g., sauerkraut, kefir, kimchi, Greek yogurt) to rebalance the gut microbiome.
  • Hydration and Detoxification
  • Drink plenty of filtered water to flush out toxins released as harmful microorganisms die off.
  • Support liver detoxification with cruciferous vegetables like broccoli, kale, and Brussels sprouts.

Food List for the Antimicrobial Diet

How to Incorporate Antimicrobial Foods into Your Diet

Incorporating antimicrobial foods into your daily routine is an easy and enjoyable way to support gut health. By introducing a variety of natural, potent ingredients into your meals and snacks, you can help reduce harmful microbes, enhance digestion, and boost overall wellness.

Start gradually with these powerful foods to avoid discomfort and aim for consistent use to maximise their benefits.

  • Always Start Gradually: Some antimicrobial foods, like garlic and oregano oil, are highly potent and can cause die-off symptoms if introduced too quickly. Begin with small amounts and increase gradually.
  • Start Your Day with a Detoxifying Drink: Begin your day with warm water mixed with apple cider vinegar, lemon, and a dash of turmeric for an antimicrobial boost.
  • Add Garlic to Your Meals: Garlic can be added to nearly any savory dish, from stir-fries to soups, enhancing both flavor and antimicrobial potency.
  • Snack on Antimicrobial Foods: Try snacking on antimicrobial-rich foods like yogurt with a drizzle of Manuka honey or sipping on a cup of ginger tea.
  • Use Antimicrobial Oils in Cooking: Coconut oil and oregano oil can be used in cooking or as a finishing oil to increase the antimicrobial properties of your meals.
  • Pair with Probiotics: While antimicrobial foods help reduce pathogenic organisms, pairing them with probiotics ensures that beneficial bacteria are replenished and supported.
  • Incorporate Spices: Spices like cinnamon, thyme, and clove can be added to dishes for both flavour and health benefits.
  • Incorporate Variety: Use a combination of antimicrobial foods to target a broader range of pathogens and prevent resistance.
  • Stay Consistent: Regular inclusion of antimicrobial foods in your diet, such as adding garlic to meals or using coconut oil in cooking, can provide ongoing support for your gut health.

Candida and Gut Health

It’s important to recognise that simply removing carbohydrates does not “starve” Candida. Instead, it is often the consumption of sugar, processed foods, alcohol, antibiotics, and high stress levels that contribute to Candida and gut imbalances (Jawhara 2023).

Surprisingly, many fruits and vegetables often eliminated in Candida-focused diets may not need to be excluded, indeed, many fruits and vegetables have antimicrobial properties, but here are some of your best choices:

Foods to Include

Gut-Healing and Anti-Inflammatory Foods

  • Bone broth
  • Wild-caught fish (e.g., salmon, mackerel)
  • Flaxseeds and chia seeds
  • Leafy greens (e.g., spinach, kale)
  • Berries (e.g., blueberries, raspberries)
  • Extra virgin olive oil

Low-FODMAP Vegetables (For SIBO)

  • Zucchini
  • Spinach
  • Cucumber
  • Green beans
  • Bell peppers

Probiotic Foods

(Introduce after the antimicrobial phase)

  • Sauerkraut
  • Kimchi
  • Coconut yogurt (unsweetened)
  • Water kefir

Foods to Avoid

  • Sugar and sweeteners
  • Refined carbohydrates (white bread, pastries, pasta)
  • Gluten-containing grains (wheat, barley, rye)
  • Dairy (if sensitive)
  • Fermentable fibre (high-FODMAP foods) during the initial phase if SIBO is present.
  • Alcohol and caffeine

Sample 7-Day Antimicrobial Diet Plan

Day 1

  • Breakfast: Scrambled eggs cooked in coconut oil with sautéed spinach and garlic.
  • Snack: Handful of pumpkin seeds.
  • Lunch: Grilled salmon with steamed zucchini, green beans, and olive oil drizzle.
  • Snack: Ginger tea with a few slices of cucumber.
  • Dinner: Turmeric chicken soup with bone broth, carrots, and celery.

Day 2

  • Breakfast: Coconut yogurt with chia seeds and a sprinkle of cinnamon.
  • Snack: A boiled egg and a slice of avocado.
  • Lunch: Grilled chicken salad with mixed greens, cucumber, and ACV dressing.
  • Snack: A small handful of walnuts.
  • Dinner: Baked cod with sautéed garlic, turmeric cauliflower rice, and steamed broccoli.

Day 3

  • Breakfast: Smoothie with unsweetened almond milk, spinach, coconut oil, and berries.
  • Snack: Ginger tea with celery sticks and almond butter.
  • Lunch: Zucchini noodles with garlic shrimp and olive oil.
  • Snack: Clove tea or turmeric latte with coconut milk.
  • Dinner: Roasted turkey breast with Brussels sprouts and cinnamon-spiced carrots.

Day 4

  • Repeat variations of previous meals using different proteins (e.g., turkey, lamb) and vegetables.

Lifestyle Tips for Success

  • Support the Die-Off Reaction: As harmful microbes are eradicated, toxins are released, causing symptoms like fatigue or headaches. Manage this with hydration, rest, and gentle detox practices like Epsom salt baths.
  • Avoid Overeating: Small, frequent meals prevent fermentation and bloating, especially for individuals with SIBO.
  • Track Symptoms: Keep a journal to monitor food reactions and progress over time.
  • Rotate Foods: Prevent food sensitivities by varying your antimicrobial and supportive food choices.
  • Incorporate Stress Management: Chronic stress impairs digestion. Practice relaxation techniques like yoga, meditation, or deep breathing.

Key Take-Aways

  • An antimicrobial diet targets harmful microorganisms while supporting beneficial gut bacteria.
  • The diet eliminates sugar, refined carbs, gluten, and inflammatory foods while emphasizing antimicrobial and gut-healing options.
  • Key foods include garlic, coconut oil, ginger, turmeric, and bone broth.
  • Low-FODMAP vegetables and probiotics are essential for managing SIBO and restoring balance.
  • Lifestyle practices like hydration, stress management, and symptom tracking enhance the diet’s effectiveness.

This structured plan helps eradicate Candida, SIBO, IBS, and IBD while restoring gut balance and promoting long-term health.

Man with glasses smiling outdoors.

Eric Bakker N.D.

Greetings! I am a naturopathic physician from New Zealand. Although I’ve retired from clinical practice since 2019, I remain passionate about helping people improve their lives. You’ll find I’m active online with a focus on natural health and wellbeing education through my Facebook page and YouTube channel, including this website.

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