Gut Health

Foods that may support a healthier gut

Your gut is home to trillions of microorganisms that influence digestion, immunity, mental health and overall wellbeing. In this guide, we explain what the gut microbiome is, how it works and what you can do to support it.

Dr Emily Carter

Medically reviewed by Medical Reviewer

Updated 20 October 2026

· 10 min read

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What is the gut microbiome?

The gut microbiome is the community of trillions of microorganisms – including bacteria, viruses, fungi and other microbes – that live in your digestive tract. These microbes play a crucial role in breaking down food, producing essential nutrients and supporting your immune system.

Gut Insight

Your gut microbiome is often described as an 'extra organ' because of its profound influence on so many aspects of your health.

Why is it important?

A healthy, diverse gut microbiome is associated with better digestion, a stronger immune system, improved mental wellbeing and a lower risk of certain chronic diseases.

Better digestion

Stronger immunity

Improved mental health

Supports nutrient absorption

How can you improve your gut microbiome?

There are several evidence-based ways to support a healthy, diverse microbiome, including a varied, fiber-rich diet, regular exercise, good sleep and stress management.

Want to understand your own microbiome?

Our gut microbiome test can help you explore the bacteria present in your gut and receive personalized insights and actionable recommendations.

Explore Microbiome Testing

Looking for a quick answer?

You may find what you're looking for in our frequently asked questions, including information about testing, orders, results and our services.

Gut health refers to how well your digestive system functions and how the microorganisms living in your gut interact with your body. It can be influenced by factors such as diet, lifestyle, medications, sleep and overall health.

The gut microbiome is the community of bacteria and other microorganisms that live throughout your digestive tract. These microorganisms can play important roles in digestion, metabolism and interactions with the immune system.

Microbiome testing analyses a sample to provide information about the microorganisms detected in your gut. Results can offer insights into your microbiome, but they should be interpreted alongside your symptoms, health history and other relevant information.

Depending on the test, you may provide a sample at home and send it to a laboratory for analysis. You’ll then receive your results along with information explaining what the test measures and what the findings may mean.

Not necessarily. Gut health and microbiome tests have different purposes and limitations, and many are not designed to diagnose or rule out medical conditions. If you have persistent or concerning symptoms, speak with a qualified healthcare professional.

About the author

Dr Emily Carter

PhD, Human Nutrition

Specialist in dietary interventions and gut microbiome research.

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Medical Reviewer

Prof. James Wilson

Consultant Gastroenterologist He is an NHS consultant and researcher specializing in digestive health and the microbiome.

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