Our expertiseGut health

Gut health & digestion

The gut is one of the most influential systems in the body. Far beyond digestion, it shapes immunity, nutrient absorption, inflammation, mood and energy. When the gut is compromised, the effects are often felt everywhere else.
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Why Gut health &
digestion matters

The gut does a lot more than digest food. It is also where around 70 to 80 percent of the body's immune system lives. When the gut lining is compromised, or when the balance of bacteria shifts, the effects are felt far beyond digestion.

Gut dysfunction is one of the most common underlying factors we find in people with chronic symptoms, including many who have had normal results elsewhere.

Concerns where
Gut health & digestion
may play a role

Together with Dr Fiona Forbes and the medical team, we use over 400 biomarkers to understand the underlying factors contributing to symptoms.

BloatingAbdominal painConstipationDiarrhoeaBloatingAbdominal painConstipationDiarrhoea
IBSLeaky gutFood intolerancesNauseaIBSLeaky gutFood intolerancesNausea
RefluxCrohn's diseaseUlcerative colitisSIBORefluxCrohn's diseaseUlcerative colitisSIBO
Candida overgrowthSkin conditionsBrain fogFatigueCandida overgrowthSkin conditionsBrain fogFatigue
Mood changesWeight fluctuationsPoor immunityNutrient deficienciesMood changesWeight fluctuationsPoor immunityNutrient deficiencies

These concerns are not assessed in isolation, but always in the context of the full biological picture.

How gut health & digestion
connects to other systems

Gut dysfunction rarely stays contained to the digestive system. It frequently affects or is worsened by patterns elsewhere.

The gut microbiome directly influences immune regulation and inflammatory patterns
Poor gut lining integrity allows substances into the bloodstream that drive systemic inflammation
Gut bacteria produce neurotransmitters that affect mood, sleep and cognitive function
Nutrient absorption depends on gut health, affecting energy, hormones and immunity
The gut-liver axis means gut dysfunction increases the detoxification burden on the liver

Our approach

At Forbes.health, we take a systems-based approach to gut health. We assess the microbiome, gut lining integrity, digestive function and how these interact with immune, hormonal and neurological patterns.

That means looking beyond a single stool test to understand the full picture of what is happening in the gut and why.

Our role is not only to identify what is out of range, but to understand how the body is functioning as a whole, and what may be driving symptoms beneath the surface.

Dr Fiona Forbes

Dr Fiona Forbes,

Chief Medical Officer

How we assess

Relevant testing panels

The most relevant tests depend on the individual, their symptoms and their medical history. For gut health & digestion, the following panels are frequently used:

Gastro-intestinal Map (GI-Map)

Analyses gut bacteria, gluten sensitivity, detoxification pathways, immune response, digestive enzymes and infections. Identifies dysbiosis, autoimmune patterns and GI concerns including IBS. The most complete picture of what is happening inside the gut.

Mucosal Barrier Assessment (MBA)

Evaluates gut lining integrity, inflammation, histamine and DAO production. Directly relevant where leaky gut, food intolerances, skin problems or autoimmune patterns are present.

Organic Acids Test (OAT)

Evaluates yeast, bacteria, oxalates, vitamins and neurotransmitter markers. Adds important context where gut dysfunction overlaps with fatigue, mood or neurological symptoms.

Food Sensitivities (184 IgG)

Tests reactions to 184 foods via IgG antibodies. Relevant where dietary triggers are contributing to gut inflammation, bloating and systemic symptoms.

From insight to direction

Whether navigating persistent symptoms or taking a proactive approach, the goal is always the same: to understand what your body is doing and why.

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Questions and answers

Frequently asked questions

Yes. Gut dysfunction often shows up in other areas first, such as skin conditions, brain fog, fatigue or mood changes. The gut is so interconnected that symptoms elsewhere are frequently rooted in what is happening there.

Yes. Standard tests assess a narrow set of markers. We test far more broadly, including the microbiome, gut lining integrity, inflammatory markers and digestive function, and we assess how they interact with the rest of your biology.

Yes. The gut produces a significant proportion of the body's serotonin and communicates directly with the brain via the vagus nerve. Gut imbalances are frequently found alongside anxiety, low mood and cognitive symptoms.

A gastroenterologist focuses on structural and disease-level gut conditions. We look at the broader functional picture: microbiome balance, gut lining integrity, digestive capacity and how these interact with other systems. We are not a replacement for specialist care, but we often find patterns that fall outside what standard gastroenterology examines.

Start with a free discovery call. We will go through your symptoms, history and what has already been tried, and tell you honestly whether gut health is the primary area to address.