Herbs and supplements for SIBO

Herbs and supplements for SIBO

Medically reviewed by:

Dr John Freeman


Small Intestinal Bacterial Overgrowth (SIBO) often requires a multi-layered approach to restore balance, repair the gut lining, and relieve the symptoms caused by unwanted bacterial activity in the small intestine. While pharmaceutical antibiotics are one option, herbal antimicrobials and natural gut-supporting compounds have been shown in clinical studies to be highly effective, making them a preferred choice for many people looking for a gentler, holistic strategy.


At FixBIOME, we use a coordinated system of ingredients that work together across four key stages of gut repair. Each category targets a different part of the healing process:


  1. Repair & Restore Integrity – Strengthening the gut lining, supporting tight junctions, and helping the intestine recover from the damage caused by gas pressure, inflammation, and repeated irritation.


  2. Calm, Soothe & Relieve Symptoms – Easing cramping, bloating, discomfort, spasms, indigestion, and the stress-related symptoms that commonly accompany SIBO.


  3. Rebalance the Microbiome – Using targeted herbal antimicrobials to address bacterial or fungal overgrowth, disrupt biofilms, and rebalance the microbial environment in the small intestine.


  4. Protect & Strengthen for Long-Term Resilience – Supporting immune function, mucosal defence, and long-term microbial stability to reduce relapse risk and maintain a healthy gut environment.


Because SIBO affects people on multiple levels—structural, microbial, and symptomatic—each of these ingredient categories plays a crucial role. When combined, they can restore gut integrity, relieve daily discomfort, address the root cause of overgrowth, and support long-term digestive health.

Below is a breakdown of some of the most clinically studied herbs, extracts, and natural compounds used for SIBO recovery, organised according to their primary function in the gut-healing process.

- Tap an ingredient to learn more -

1. Repair & Restore Integrity

1. Repair & Restore Integrity

L-Glutamine

Zinc Oxide

Glycyrrhiza Glabra

Althaea Officinalis

2. Calm, Soothe & Relieve Symptoms

Lemon Balm

Zingiber Officinale

Peppermint

Anethum Graveolens

3. Rebalance the Microbiome

Thyme Oil

Oregano Oil

Berberis Vulgaris

Coptis Chinensis

Berberis Aristata

4. Protect & Strengthen for Long-Term Resilience

Salvia Officinalis

Scutellaria Baicalensis

Quercetin Dihydrate

Rheum Officinale

Powdery white substance with textured lines in a circular format.

L-Glutamine

Rebuilds the gut lining from the inside out. Fuels the cells that repair your intestinal wall, helping reduce sensitivity, bloating, and “leaky gut” reactions caused by barrier damage.

Slices of dried root with textured bark and light wood.

Glycyrrhiza Glabra

Targets inflammation in the gut lining to relieve burning, cramping, and irritation. Supports the body’s cortisol regulation to calm stress-driven flare-ups.

Close-up of a white flower with purple center and green leaves.

Althaea Officinalis

Forms a protective coating along the digestive tract, reducing friction, pain, and irritation while allowing tissue to regenerate effectively.

White powdery substance with horizontal lines on a flat surface.

Zinc Oxide

Essential for tissue repair and immune regulation in the gut. Helps seal tiny gaps in the intestinal wall so food and toxins stop triggering inflammation and discomfort.

2. Calm, Soothe & Relieve Symptoms

1. Repair & Restore Integrity

L-Glutamine

Zinc Oxide

Glycyrrhiza Glabra

Althaea Officinalis

2. Calm, Soothe & Relieve Symptoms

Lemon Balm

Zingiber Officinale

Peppermint

Anethum Graveolens

3. Rebalance the Microbiome

Thyme Oil

Oregano Oil

Berberis Vulgaris

Coptis Chinensis

Berberis Aristata

4. Protect & Strengthen for Long-Term Resilience

Salvia Officinalis

Scutellaria Baicalensis

Quercetin Dihydrate

Rheum Officinale

A cluster of green mint leaves in a circular frame.

Lemon Balm

Eases cramping, bloating, and stress-related gut tension by relaxing smooth muscle in the intestines and supporting balanced motility.

Close-up of several fresh ginger roots.

Zingiber Officinale

Improves how quickly food moves through your system to stop that heavy, sluggish feeling after meals. Reduces nausea and supports smoother digestion.

Close-up of yellow fennel flowers in sunlight.

Anethum Graveolens

Reduces post-meal bloating and discomfort by helping your body release gas and digest food more efficiently.

Close-up of green mint leaves in a circular frame.

Peppermint Oil

Relaxes tight intestinal muscles to relieve pain and pressure from trapped gas, helping your stomach feel flatter and lighter.

1. Repair & Restore Integrity

L-Glutamine

Zinc Oxide

Glycyrrhiza Glabra

Althaea Officinalis

2. Calm, Soothe & Relieve Symptoms

Lemon Balm

Zingiber Officinale

Peppermint

Anethum Graveolens

3. Rebalance the Microbiome

Thyme Oil

Oregano Oil

Berberis Vulgaris

Coptis Chinensis

Berberis Aristata

4. Protect & Strengthen for Long-Term Resilience

Salvia Officinalis

Scutellaria Baicalensis

Quercetin Dihydrate

Rheum Officinale

3. Rebalance the Microbiome

1. Repair & Restore Integrity

L-Glutamine

Zinc Oxide

Glycyrrhiza Glabra

Althaea Officinalis

2. Calm, Soothe & Relieve Symptoms

Lemon Balm

Zingiber Officinale

Peppermint

Anethum Graveolens

3. Rebalance the Microbiome

Thyme Oil

Oregano Oil

Berberis Vulgaris

Coptis Chinensis

Berberis Aristata

4. Protect & Strengthen for Long-Term Resilience

Salvia Officinalis

Scutellaria Baicalensis

Quercetin Dihydrate

Rheum Officinale

Close-up of green leafy plants in a circular frame.

Thyme Oil

Targets bacterial and fungal overgrowth that cause bloating, fatigue, and “gut fog.” Helps clear unwanted microbes so beneficial bacteria can repopulate.

Close-up of green leaves in a circular frame.

Oregano Oil

Highly active against bacterial imbalance and yeast overgrowth. Works like a microbial reset, helping reduce bloating and digestive irritation.

Close-up of dried, twisted roots with brown textures.

Coptis Chinensis

Delivers berberine and related alkaloids that limit gut-driven inflammation and support a healthier microbial ratio for more stable digestion.

Cluster of yellow flowers with green leaves in a circular frame.

Berberis Aristata

Assists in clearing bacterial build-up and supports detoxification so your gut can reset to a healthier baseline.

Bright red and orange berries with water droplets and green leaves.

Berberis Vulgaris

Provides berberine compounds that fight harmful bacteria while improving bile flow, key for digesting fats and reducing constipation.

4. Protect & Strengthen for Long-Term Resilience

1. Repair & Restore Integrity

L-Glutamine

Zinc Oxide

Glycyrrhiza Glabra

Althaea Officinalis

2. Calm, Soothe & Relieve Symptoms

Lemon Balm

Zingiber Officinale

Peppermint

Anethum Graveolens

3. Rebalance the Microbiome

Thyme Oil

Oregano Oil

Berberis Vulgaris

Coptis Chinensis

Berberis Aristata

4. Protect & Strengthen for Long-Term Resilience

Salvia Officinalis

Scutellaria Baicalensis

Quercetin Dihydrate

Rheum Officinale

Close-up of green leaves with textured surfaces in a circular frame.

Salvia Officinalis

Reduces gut-based inflammation that drives food reactivity and discomfort. Helps protect the lining long-term from oxidative stress.

Close-up of a purple flower with green leaves in the background.

Scutellaria Baicalensis

Decreases inflammatory signaling in the gut wall and helps reinforce the protective barrier that keeps irritants out of your bloodstream.

White flowering plants with green foliage in a circular frame.

Rheum Officinale

Encourages gentle, regular elimination to prevent toxin build-up and constipation or other bowel irregularities without overstimulating your system.

Circular pattern with creamy textured yellow powder.

Quercetin Dihydrate

Supports immune stability in the gut. Strengthens barrier integrity and reduces inflammation behind chronic food sensitivities and fatigue.

1. Repair & Restore Integrity

L-Glutamine

Zinc Oxide

Glycyrrhiza Glabra

Althaea Officinalis

2. Calm, Soothe & Relieve Symptoms

Lemon Balm

Zingiber Officinale

Peppermint Oil

Anethum Graveolens

3. Rebalance the Microbiome

Thyme Oil

Oregano Oil

Berberis Vulgaris

Coptis Chinensis

Berberis Aristata

4. Protect & Strengthen for Long-Term Resilience

Salvia Officinalis

Scutellaria Baicalensis

Quercetin Dihydrate

Rheum Officinale

L-Glutamine

Essential amino acid that fuels gut repair, supports lining integrity, and promotes long-term digestive wellness.

Lemon Balm

Helps calm the nervous system and relieve digestive tension supporting gut-brain harmony and balance.

Close-up of several fresh ginger roots.

Zingiber Officinale

Ginger root that naturally stimulates digestion, reduces bloating, and soothes the digestive tract.

Close-up of green sage leaves with textured surfaces.

Salvia Officinalis Extract

Traditionally used to aid digestion and calm the nervous system, supporting internal balance and clarity.

Scutellaria Baicalensis

Traditional root extract that supports immune regulation and helps calm inflammatory responses in the gut.

Close-up of textured, light-colored powder with horizontal lines.

Quercetin Dihydrate

Traditional root extract that supports immune regulation and helps calm inflammatory responses in the gut.

Thyme Oil

Traditionally used to aid digestion and calm the nervous system, supporting internal balance and clarity.

Rheum Officinale

Traditional root extract that supports immune regulation and helps calm inflammatory responses in the gut.

Althaea Officinalis

Traditional root extract that supports immune regulation and helps calm inflammatory responses in the gut.

Oregano Oil

Traditionally used to aid digestion and calm the nervous system, supporting internal balance and clarity.

Glycyrrhiza Glabra

Traditional root extract that supports immune regulation and helps calm inflammatory responses in the gut.

Close-up of textured, light-colored powder with horizontal lines.

Berberis Vulgaris

Traditional root extract that supports immune regulation and helps calm inflammatory responses in the gut.

Close-up of fresh green mint leaves.

Peppermint

Traditionally used to aid digestion and calm the nervous system, supporting internal balance and clarity.

Green leafy plants growing in soil.

Coptis Chinensis

Traditional root extract that supports immune regulation and helps calm inflammatory responses in the gut.

Branch with clusters of small yellow flowers and green leaves.

Berberis Aristata

Traditional root extract that supports immune regulation and helps calm inflammatory responses in the gut.

Yellow dill flowers in a sunny outdoor setting.

Anethum Graveolens

Traditionally used to aid digestion and calm the nervous system, supporting internal balance and clarity.

White powdery substance with horizontal lines on a flat surface.

Zinc Oxide

Traditional root extract that supports immune regulation and helps calm inflammatory responses in the gut.

Quality of herbs and natural antimicrobials

When choosing supplements or herbal products, it’s important to understand that quality can vary dramatically—especially in an industry with limited regulation. Two products may list the same ingredient on the label, yet perform very differently in the body.


Because these are natural compounds, their effectiveness depends heavily on factors such as growing conditions, sourcing, extraction methods, and manufacturing standards. These differences can influence potency, purity, and most importantly, bioavailability—the body’s ability to absorb and utilise the ingredient for its intended purpose.


Selecting high-quality, well-formulated herbs ensures you receive the full therapeutic benefits these compounds are capable of providing.

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