Functional medicine laboratory testing

Uncovering the root causes of your health concerns can be helped dramatically by specialized laboratory tests. 

These cutting-edge tests are typically not offered in a conventional medical setting. 

They are however available in most countries with the help of a qualified practitioner. 

Information on the tests most commonly offered can be found below and include test instructions and a sample report. 

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Many have strict pre-test instructions but can be completed at home over a weekend and couriered on the Monday. It is best to avoid testing around public holidays as some tests are time sensitive. 

All test kit purchases are non-refundable once your specimen has been received for testing. Prices are subject to change and admin or courier fees may be additional.

Stool testing


Stool analysis is particularly useful for those with:

  • Gastrointestinal and Digestive Symptoms

  • Irritable bowel syndrome

  • Inflammatory Bowel Disease

  • Autoimmune Disease

  • Inflammation

  • Food Allergies and Sensitivities

  • Nutritional Deficiencies

  • Joint Pain

  • Chronic or Acute Diarrhea

  • Bloody Stool

  • Mucosal Barrier Dysfunction

  • Abdominal Pain

  • Fever and Vomiting

It can:

  • assess the gut microbiome and compare against published normobiotic reference population.

  • identify bacteria, viruses, parasites and yeasts that may be contributing to symptoms. 

  • assess stool chemistry looking at inflammatory, immune, intestinal health and digestive markers.

  • with susceptibility testing, determine the most appropriate natural treatment to address any pathogenic infection found. 

Doctor's Data offers my preferred stool analysis as it utilizes MALDI-TOF laser technology and can identify more than 1400 organisms. It also offers accurate parasite testing with 3 consecutive stool samples and PCR analysis (multiplex DNA technology). 

H Pylori testing can be added to the GI 360 test for $79 NZD. 



Microbiome Abundance & Diversity, Viruses, Parasites. Bacteria, Yeasts, Stool Chemistry, Beta-Glucuronidase


$595 NZ

$410 US approx

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Microbiome Abundance & Diversity, Viruses, Parasites, Bacteria, Yeasts


$455 NZ

$310 US approx



Microbiome Abundance & Diversity with DI Score


$269 NZ

$180 US approx


SIBO Breath Test

Used to evaluate for a Small Intestinal Bacterial Overgrowth (SIBO) which is an underlying cause of Irritable Bowel Syndrome (IBS) in approximately 50% - 78% of sufferers. 

Other symptoms of SIBO can include:

  • Bloating/abdominal distension with associated discomfort, particularly after eating

  • Gas and belching

  • Food Intolerances

  • Constipation (generally associated with methanogenic bacteria)

  • Diarrhea (generally associated with hydrogenic bacteria)

  • Immune activation (e.g. food sensitivities)

  • Nutrient deficiencies i.e. vitamin B12 & Iron

  • Weight loss / weight gain

  • Fatigue or brain fog

  • Fibromyalgia

A restricted diet is required for 24 hours in preparation.

Following a collection of a baseline breath sample, either a lactulose or glucose test substrate is consumed.

The bacteria may ferment the lingering substrate and produce hydrogen and/or methane. These gases are absorbed into the bloodstream and exhaled through the breath. Breath samples are collected every 15-20 minutes (depending on the substrate used) for up to 3 hours and analysed for the amount of Hydrogen, Methane and CO2 produced.

SIBO tests are pre-paid with the kit. 


SIBO Breath Test - Lactulose

Most popular, but may produce more false positives.

Better able to detect SIBO in lower small intestine.

Not a good option if have rapid intestinal transit or a true milk allergy.


$215 NZ

$150 US approx


SIBO Breath Test - Glucose

Most accurate at detecting SIBO in the upper intestines. It generally will not detect distal SIBO. It is not suitable for those with diabetes, blood sugar issues or carbohydrate malabsorption.


$215 NZ

$150 US approx


Precision Point P88-Dietary Antigen Test

One of the best tests I've found to assess food allergies and sensitivities. 

The P88 Dietary Antigen Test is one single blood test combining IgE, IgG, IgG4 and complement (C3d) reactions to 88 of the most common foods found in the diet. 

Overt IgE-mediated food allergies can lead to hives, anaphylaxis, or digestive issues while delayed food sensitivities (IgG and IgG4) are linked to sinus problems, acne, gas, bloating, fatigue, constipation, autism, irritable bowel syndrome, and even depression.

Precision Point Diagnostics provides reliable, reproducible semi-quantitative measurement of IgE, total IgG, and IgG4 using an indirect ELISA (enzyme-linked immunosorbent assay). The system is also capable of detecting immune complexes that contain the complement markers C3D or C1q.

Other food sensitivity tests may have a weak scientific basis or they may not give the full picture of food reactions. Some tests use live cell analysis, which is not a scientifically accepted sign of true food sensitivity or allergic reaction. Other antibody assays may measure total IgG antibodies only; they could miss food reactions that activate the inflammatory complement cascade. Still other tests may measure only a specific IgG subclass and miss out on information about IgG1, IgG2, IgG3, and IgG4, which is reported as total IgG in the Precision Allergy 88.


P88 Dietary Antigen Test

Requires a blood draw from a specified lab


$489 NZ

$340 US approx


D.U.T.C.H. Hormonal & Adrenal Stress Testing

Precision Analytical has one of the most advanced and comprehensive models for testing steroid and adrenal hormones.

Collection at home is easy with dried urine and/or saliva samples. 

These tests are useful for those with concerns of chronic fatigue, adrenal exhaustion, PCOS, acne, period-related issues, insomnia, weight gain, low sex drive, infertility, PMS, hormonal cancer concerns, migraines and depression/anxiety.

There are dietary, supplement and medication restrictions for these tests, so it's important to read the instructions fully prior to testing. 



This urine only test is a comprehensive assessment of sex and adrenal hormones and their metabolites. It also includes the daily, free cortisol pattern, organic acids, melatonin (6-OHMS), and 8-OHdG.

Samples are taken around days 19-21 of a women's cycle, if pre-menopausal or anytime with men or menopausal women. 


$360 NZ

$250US approx



The DUTCH Plus adds salivary measurements of the Cortisol Awakening Response (CAR) to the DUTCH Complete which functions as a "mini stress test" & is useful for those with insomnia.

It uses four dried urine samples and five saliva samples. These samples are collected over the course of one day, from waking to bed time. 

An additional insomnia salvia cortisol can be added if waken in the night. (+$30)


$398 NZ

$280 US approx



For women with irregular cycles, no menses (and premenopausal), infertility issues, fluctuating hormone symptoms, & PCOS. (See info sheet). 

A PLUS version is also available that includes CAR & additional hormone metabolites for $50 more.


$449 NZ

$310 US approx


Organic Acids Testing (O.A.T.)

The Organic Acids Test (OAT) offers a comprehensive metabolic snapshot of a patient’s overall health with over 70 markers. 

It can give an evaluation of:

  • Intestinal yeast and bacteria (certain markers are associated with irritable bowel syndrome, inflammatory bowel disease, neuropsychiatric disorders, autism, fibromyalgia, chronic fatigue, and more)

  • Vitamin and mineral levels

  • Oxidative Stress and antioxidant levels (indicator of chronic inflammation and ability to detoxify effectively)

  • Neurotransmitter levels (impacts brain, nervous system and mood)

  • Oxalate levels (high levels are associated with kidney stones, vulvodynia and oxalate toxicity symptoms)

  • Fatty acid metabolism (high level of fatty acids metabolites can indicate protein malnutrition, type I diabetes, severe GI Candida overgrowth, various genetic disorders, and cause low blood sugar and lethargy)

  • Mitochondrial function (mitochondria are our energy powerhouse)

It is therefore particularly useful for those with:

  • Chronic fatigue

  • Chronic pain and inflammation

  • Fibromyalgia

  • Gut or digestive issues

  • Depression and/or anxiety

  • Autism


  • Neuropsychiatric or behavioural disorders 

  • Seizure disorders

  • Kidney stones, vulvodynia, chronic joint pain and other symptoms of oxalate toxicity

  • Brain fog or poor concentration/focus

  • Chronic headaches and migraines

  • Suspected Clostridia infection

There are also Organic acids tests for mycotoxins (GPL- Mycotox) and toxic nonmetal chemicals (GPL-TOX). 


Organic Acids Test (O.A.T.) 

Urine test that can easily be done at home. Is even suitable for children.


$327 NZ

$230 US approx



+64 21 795333



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