Why gut health and gut microbiome testing matter
Your gut does far more than digest food. The gut microbiome – the trillions of bacteria, fungi and other microorganisms living in the digestive tract – plays a key role in immunity, inflammation, metabolism, hormone balance, mood and even brain health. In this article, a consultant functional medicine specialist with Functional Doctors explains the functional medicine approach to gut health, and the kind of testing utilised when assessing gut health.
What is functional medicine?
Functional medicine aims to investigate the root cause of illnesses, rather than just treating the symptoms. Functional medicine practitioners focus more on the patient’s lifestyle and personal history – what they eat, how they exercise, what their sleep is like, their stressors, and how they relax – to holistically treat the patient.
What is the role of the gut microbiome in assessing health?
The microbiome is a vital component in the process of digestion: it breaks down food, extracts vitamins, and helps the body absorb the nutrients. When there are abnormalities to the gut microbiome, it can put the whole body off-kilter.
In functional medicine, gut health is often the first place we look when patients experience symptoms such as:
- Bloating
- Constipation
- Diarrhoea
- Reflux
- Indigestion
- Fatigue
- Skin problems
- Food sensitivities and allergies
- Headaches
- Low mood and emotional instability
- Autoimmune conditions
- Unexplained inflammation
Why gut health and gut microbiome testing matter
When the gut microbiome is out of balance – a state known as dysbiosis – it can affect the whole body. Poor gut health may contribute to digestive disorders such as IBS, SIBO and reflux, but it can also influence wider issues, including anxiety, low energy, weight gain, poor immunity and chronic inflammation. Gut microbiome testing can provide valuable insight into what is happening inside the digestive system.
Advanced stool and breath testing may identify:
- Imbalances in beneficial and harmful bacteria
- Yeast or fungal overgrowth
- Parasites or infections
- Signs of inflammation
- Poor digestion or absorption
- Gut permeability (often referred to as “leaky gut”)
- Small intestinal bacterial overgrowth (SIBO)
Rather than simply masking symptoms, functional medicine uses this information to identify the root cause of health problems and create a personalised treatment plan. This may include dietary changes, probiotics, prebiotics, supplements, stress management and lifestyle interventions to restore balance in the gut.
At Functional Doctors, we use advanced stool, urine and breath testing alongside a detailed assessment of diet, lifestyle, stress and medical history. This allows us to create tailored treatment plans that support long-term gut health and overall wellbeing.
A healthy gut is the foundation of good health. By understanding your microbiome, we can better understand the underlying drivers of symptoms and help you move towards lasting improvements in your health.

