Common Signs You Might Need an Intolerance Test
Optimum Health Test
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Lab processing in 3 business days.
Hair sample testing
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Identify triggers
Find possible causes of bloating, fatigue, headaches, poor skin or digestive issues.
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Understanding Sensitivities and Intolerances


What's tested
High Reactivity
Displayed as red. These items are most likely to cause sensitivity. They may be contributing to physical symptoms, we recommend a structured elimination diet, followed by gradual reintroduction for these items.
Moderate Reactivity
Displayed as amber. These items might cause sensitivity. Having multiple moderate reactivity items in one meal might cause symptoms due to their cumulative effect. We recommend after prioritising the high reactivity item elimination diet that you then follow a structured elimination diet, followed by gradual reintroduction to these items also.
No Reactivity / within range
These items are safe and fall within the optimal range. These items will not be listed on your report.
Many customers refer to this type of testing as a “food intolerance test,” although the test focuses on sensitivity responses, offering a broader understanding of how your body reacts over time.
How does it work?
Activate your test online
Order your test online and track your kit. You can activate it using the unique redemption number provided and input your patient information.
Take your sample at home
Send your sample to our laboratory
Receive your test results

What you receive after we’ve tested your sample
A detailed report with your intolerance ratings
Once your sample has been processed, you are provided with a comprehensive intolerance test report, offering detailed insights and analysis
of your sensitivities.
Free elimination diet guide
You’ll also receive a wellbeing guide, designed to help you navigate the world of elimination diets effortlessly.
Complimentary food diary
Simplify your reintroduction process with our free, user-friendly diary template, crafted to help you accurately document and analyse your food experiences.

Approved by our panel of medical and nutritionist experts

Dr. Joseph Nightingale
Qualified Doctor and health & Science Writer

Dr. Kristen Poe
Functional Medicine practitioner and Naprapathic doctor

Maria Griffiths
Registered Nutrition Practitioner, Dip. ION FION MBANT NTCC CNHC, Senior Associate Member of the Royal Society of Medicine

Kate Knowler
Registered nutritional therapist, phlebotomist, and a best-selling blood test interpretation expert, BANT, CNHC.
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FAQs
What is Bioresonance Hair testing?
Bioresonance therapy is a safe, gentle, and non-invasive complementary technique developed in Germany in 1977. It works on the principle that every cell in the body emits electromagnetic frequencies, and imbalances in these signals may impact wellbeing.
Using specialised technology, bioresonance aims to detect and harmonise these frequencies, supporting the body's natural healing processes. Popular in parts of Europe, bioresonance offers an alternative approach to health management for those seeking holistic options.
While it is widely used within complementary and empirical healing fields, bioresonance remains a developing area of research. It should
be seen as a supportive wellness tool, not a replacement for medical diagnosis
or treatment.
Test Your Intolerance were the first online providers of this method of testing back in 2008, and have since developed the method further at our ISO accredited laboratories.
Are the tests painful?
No, the process is pain-free.
My hair is dyed, will this affect the result?
No. This will not have any effect on the results.
Do you have to cut the hair or pull it out?
You do not have to cut hair, it can be pulled
out from the root if you wish.
Can I take the test if I’m pregnant?
Maintaining excellent nutrition throughout
pregnancy and breastfeeding is crucial for the health of both mother and baby. To ensure their wellbeing, we follow a strict policy of not conducting tests, providing advice, or suggesting lifestyle changes during this period.