Microba Gut Health Testing: What It Is, Who It May Be For and Why We Use It

The gut microbiome is an ecosystem of microorganisms living within the digestive tract. These microorganisms include bacteria, fungi, archaea, viruses and other microscopic organisms that interact with our diet, digestive environment and one another.

Because this ecosystem is complex, understanding gut health involves more than looking for a single “good” or “bad” bacterium. It may involve considering microbial diversity, the relative abundance of different species, the substances produced by the microbiome and measurable markers associated with gastrointestinal function.

This is where gut health testing may provide useful information.

At The Gut Guy, we choose Microba as our microbiome testing provider because its reports give our practitioners structured information that can be reviewed alongside a patient’s symptoms, medical history, diet, medications and previous investigations.

Gut health testing is not intended to diagnose every digestive condition or replace medical assessment. Instead, it can provide another layer of information to help a suitably qualified practitioner make more informed and individualised decisions.

Who is Microba?

Microba is a microbiome science and testing company that has been conducting microbiome research and analysis since 2017. Its Microbiome Explorer testing platform uses metagenomic next-generation sequencing, often referred to as shotgun metagenomic sequencing, to analyse DNA collected from a stool sample.

Microba’s Australian laboratory is accredited by the National Association of Testing Authorities for Human Pathology under the ISO 15189 medical laboratory standard.

The company’s current Microbiome Explorer range includes different testing levels. Depending on the test selected, the report may include microbiome profiling, gastrointestinal health markers and pathogen or parasite screening.

Microba previously offered some of its testing under names including MetaXplore and Co-Biome. These products were brought together under the Microba and Microbiome Explorer names as part of a company-wide rebrand.

What is the gut microbiome?

The gut microbiome refers to the combined genetic material of the microorganisms living within the gastrointestinal tract.

These microorganisms form a dynamic ecosystem. They interact with the food we eat, including fibres, proteins, fats, polyphenols and other dietary compounds. They may also produce substances that researchers are studying in relation to digestion, immune activity, intestinal function and metabolic health.

However, microbiome science is still developing. Finding an association between a microorganism and a health condition does not necessarily mean that the organism caused the condition. Microbiome results must therefore be interpreted carefully and within the broader clinical picture.

A report should never be viewed as a standalone explanation for every symptom.

Why is gut health testing important?

Digestive symptoms can have many possible contributors. Two people experiencing bloating, constipation or irregular bowel movements may have different medical histories, dietary patterns, medication use and microbiome findings.

Symptoms alone do not always reveal what is occurring within the gastrointestinal environment.

Gut health testing may be important because it can provide objective information that helps a practitioner investigate questions such as:

• Which microbial species were detected in the sample?

• How diverse and rich is the microbial community?

• What microbiome functions are represented?

• Are certain functional groups relatively high or low?

• Are measurable gastrointestinal markers within the laboratory reference ranges?

• Does the selected test report any of the pathogens or parasites included in its panel?

• How do the results relate to the patient’s diet, symptoms and health history?

This information does not automatically produce a diagnosis or treatment plan. Its value comes from combining the laboratory data with a thorough clinical assessment.

For example, a naturopath may use the report to guide questions about digestive function, bowel habits, previous medications and supplement use. A practitioner working in clinical nutrition may review the same information alongside food intake, fibre tolerance, meal patterns and nutritional adequacy.

The test becomes one piece of a broader assessment rather than the entire assessment.

What does Microba gut health testing examine?

Microba’s current Microbiome Explorer range is available at different levels. The most appropriate option depends on the patient’s symptoms, clinical history and the questions the practitioner is attempting to investigate.

Microbiome profiling

Microbiome Explorer Essentials uses metagenomic analysis to assess more than 28,000 microbial species within its reference catalogue, including bacteria, fungi and protists.

The microbiome section of the report may provide information about areas such as:

• Microbial diversity

• Microbial richness

• Species detected in the sample

• Relative abundance of different organisms

• Microbial functional groups

• The potential of the microbial community to produce or process certain substances

These findings describe characteristics of the sample collected at that particular point in time. They should not be interpreted as permanent features of a person’s gut.

Diet, medications, supplements, illness, travel, bowel habits and other factors may influence the microbiome.

Gastrointestinal health markers

Microbiome Explorer Extended includes microbiome profiling together with a selection of gastrointestinal markers.

Microba currently lists the following markers as part of the Extended test:

• Faecal occult blood

• Lactoferrin

• Calprotectin

• Secretory IgA

• Pancreatic elastase

• Zonulin-family peptides

These markers relate to different aspects of the gastrointestinal environment. However, no individual marker should be interpreted without considering the patient’s symptoms, medications, health history and other medical investigations.

An abnormal or unexpected result may require discussion with a GP, gastroenterologist or another appropriately qualified medical professional.

Pathogen and parasite screening

Microbiome Explorer Comprehensive includes microbiome profiling, gastrointestinal markers and pathogen and parasite detection panels.

It is important to understand that a laboratory panel can only report the organisms included within that panel and detected under its testing conditions. A result should not be interpreted as ruling out every possible infection, digestive condition or cause of symptoms.

How does Microba testing work?

The process begins with a practitioner determining whether gut health testing is appropriate and selecting the relevant test.

The patient then receives a home collection kit and follows the supplied instructions to collect a small stool sample. The sample is returned for laboratory processing, where microbial DNA is extracted, sequenced and analysed through Microba’s bioinformatics system.

Microba uses shotgun metagenomic sequencing, which analyses DNA within the stool sample and supports species-level microbiome profiling.

Once the analysis is complete, a report is provided for practitioner interpretation.

A proper interpretation should include more than simply reading which categories are marked high or low. The practitioner should consider:

• The patient’s primary symptoms

• Medical diagnoses and previous investigations

• Current medications

• Antibiotic history

• Supplement and probiotic use

• Typical diet and fibre intake

• Food restrictions

• Bowel frequency and stool consistency

• Recent infections or travel

• Stress, sleep and lifestyle factors

• The limitations of the individual markers

This contextual assessment is one reason we recommend completing testing with practitioner guidance rather than attempting to interpret the report alone.

Who may benefit from gut health testing?

Gut health testing may be considered for people who experience persistent or recurring digestive concerns and want to investigate their gastrointestinal environment in greater detail.

This may include people experiencing concerns such as:

• Persistent bloating

• Excessive or uncomfortable gas

• Constipation

• Loose or irregular bowel movements

• Changes in bowel habits

• Food-related digestive symptoms

• Ongoing digestive discomfort

• Difficulty knowing which dietary strategy is appropriate

• Limited progress after trying multiple generic gut health approaches

It may also be useful for someone who wants a more structured baseline before beginning a practitioner-guided nutrition or naturopathic program.

Testing is not automatically necessary for every person with digestive symptoms. Some people may benefit more from medical investigations, a detailed dietary assessment or foundational changes before microbiome testing is considered.

The decision should be based on whether the information is likely to influence the next steps in care.

Who should interpret the results?

Microba states that the microbiome component of Microbiome Explorer is for research use and is not a diagnostic tool. The company advises that results should be interpreted by qualified healthcare practitioners in the context of the patient’s clinical history, symptoms and other diagnostic findings.

At The Gut Guy, results may be reviewed through a coordinated approach involving naturopath and clinical nutrition practitioners.

The role of a naturopath

A gut-focused naturopath may review the microbiome findings alongside:

• Digestive symptoms

• Bowel function

• Medication and antibiotic history

• Previous supplement use

• Relevant health conditions

• Functional microbial findings

• Gastrointestinal markers

• Potential referral requirements

The naturopath can then determine whether a conservative, targeted supplement strategy is appropriate within their professional scope.

The role of clinical nutrition

A practitioner working in clinical nutrition may focus on how the findings relate to:

• Current dietary intake

• Fibre quantity and variety

• Food tolerance

• Protein and carbohydrate patterns

• Fermented food intake

• Polyphenol-containing foods

• Nutritional adequacy

• Restrictive diets

• Practical meal planning

Clinical nutrition is not simply telling someone to “eat healthily.” It involves examining how food can be used strategically while still ensuring the diet remains nutritionally appropriate and realistic.

The purpose is not to create an unnecessarily restrictive diet based on every microorganism listed in the report. The results are used to identify priorities and guide a gradual, clinically reasoned approach.

Why we choose Microba for gut health testing

We choose Microba because its testing provides information that can be incorporated into our structured gut health process.

Our reasons include:

A detailed microbiome profile

The report provides species-level microbiome information, diversity and richness data, and information about selected microbial functions.

This allows our practitioners to assess the microbiome as an ecosystem rather than focusing on one isolated microorganism.

Multiple categories of information

Depending on the Microbiome Explorer test selected, the report may combine microbiome profiling with gastrointestinal markers and pathogen or parasite screening.

This gives our practitioners several types of information to review within one coordinated assessment.

Practitioner-focused interpretation

The information can be reviewed by both a naturopath and a clinical nutrition practitioner.

This supports our approach of integrating dietary strategies with carefully considered naturopathic recommendations rather than treating testing, food and supplements as unrelated parts of the process.

Laboratory and analytical processes

Microba’s Australian testing laboratory is NATA accredited for Human Pathology under ISO 15189. The company also describes quality-control procedures covering sample processing, sequencing and data analysis.

For our clinic, these documented processes are relevant considerations when choosing a testing provider.

Evidence-informed reporting

Microba reports that its microbiome markers are selected through a scientific review framework that considers biological mechanisms, human research and findings within its own consented dataset.

The report still requires careful interpretation. Evidence grading does not mean that every suggested intervention will be suitable or effective for every patient.

What gut health testing cannot tell you

A microbiome test has important limitations.

It cannot:

• Diagnose every gastrointestinal condition

• Explain every symptom

• Replace a colonoscopy, endoscopy, imaging or blood test

• Confirm that the microbiome caused a health condition

• Predict exactly how someone will respond to a food or supplement

• Guarantee that a proposed treatment will produce a particular outcome

• Replace assessment by a GP or specialist when medically indicated

• Provide a permanent description of the microbiome

The gut microbiome is complex and may change over time. Results represent the sample collected under a specific set of circumstances.

Microbiome science also continues to evolve. International experts have noted that the clinical application of microbiome testing remains limited by issues including the complexity of microbiome data, incomplete knowledge and the need for clearer standards for translating research into clinical practice.

For this reason, we do not interpret the report as a definitive diagnosis. We use it as an investigative and educational tool within a broader practitioner-led process.

Is gut health testing the first step for everyone?

No.

Before arranging gut health testing, it is important to understand the person’s symptoms, medical history and previous investigations.

Medical assessment may need to take priority when symptoms are new, severe, worsening or otherwise concerning. Testing should not delay appropriate medical care.

For other patients, it may be more appropriate to begin by improving foundational areas such as:

• Meal regularity

• Fibre intake

• Dietary variety

• Hydration

• Sleep

• Stress management

• Physical activity

• Bowel habits

Gut health testing is most useful when there is a clear reason for ordering it and a qualified practitioner available to interpret what the results do—and do not—mean.

The value of a personalised approach

The purpose of gut health testing is not to produce the longest possible supplement list or remove large numbers of foods.

Its value is in helping practitioners identify priorities.

A person may have numerous findings in their report, but not every finding requires immediate intervention. A responsible plan should consider:

1. Which findings are most relevant to the person’s symptoms and history.

2. Whether medical referral or further investigation is required.

3. Which dietary changes are practical and nutritionally appropriate.

4. Whether supplements are necessary.

5. How progress will be monitored.

6. When the treatment plan should be adjusted.

Combining naturopath care with clinical nutrition allows the information to be translated into practical steps while maintaining a focus on safety, nutritional adequacy and the patient’s individual circumstances.

Should you consider Microba gut health testing?

Microba gut health testing may be worth discussing when you have persistent digestive concerns, have already completed appropriate medical investigations or want more information to guide a practitioner-supported gut health plan.

The test should be selected based on your clinical history and interpreted alongside your symptoms—not used as a standalone diagnosis.

At The Gut Guy, we choose Microba because its testing provides structured microbiome and gastrointestinal information that fits within our coordinated approach to naturopathy, clinical nutrition and practitioner support.

Our goal is not simply to give you a laboratory report. It is to help you understand which findings may be relevant, which findings require caution and how the information could be incorporated into an appropriate next-step plan.

Book a complimentary gut health clarity call

Are you unsure whether gut health testing is appropriate for you?

Book a complimentary Gut Health Clarity Call with The Gut Guy. We will discuss your symptoms, previous investigations and health goals before explaining whether Microba testing, a naturopath consultation, clinical nutrition or another pathway may be suitable.

Testing is not recommended automatically. The first step is determining whether it is likely to provide useful information for your individual situation.

This article is provided for general educational purposes and does not constitute medical advice, diagnosis or treatment. Gut microbiome findings should be interpreted by an appropriately qualified practitioner and should not replace medical assessment or investigations.