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Discover What's Happening
Inside Your Gut
Diagnostic Testing Services
Advanced, accredited testing to remove the guesswork from your health journey. Understand your unique biology and get a clear path to feeling your best.
Hear what it was like to finally get answers
Anna on her food intolerance test
“Honestly, it was a huge relief.” After years of social media pushing supplements and products, Anna wanted something clearer. Her results surprised her, and just as importantly, they helped her feel heard. “It was nice to know my pain was valid and real.”
Comprehensive Microbiome Analysis
Advanced Stool Analysis
A cutting-edge stool analysis that maps your unique gut bacteria composition. This test identifies bacterial imbalances, parasites, yeast overgrowth, and digestive markers to create a targeted restoration protocol.
What's Included
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Full bacterial composition mapping
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Complete understanding of your microbiome's strengths and weaknesses
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Custom nutrition and supplement recommendations
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Virtual Microbiome Coach for continuous guidance
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Free worldwide shipping
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€395 · 60 minute results consultation included
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Results in 2–3 weeks
Results in 2-3 weeks
Food Insight Advanced™
IgG, 270+ foods
Collecting your sample is simple: a few drops of blood on a collection card, which you post to the lab. The laboratory uses advanced macroarray technology to measure your food-specific IgG antibody reactions, and your results are quantitative, shown on an easy-to-follow scale of reactivity.
What's Included
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270+ food and drink antigens tested
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Quantitative IgG results on a clear reactivity scale
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Total immune load measurement
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Results consultation with Rachel to go through your results
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Free shipping both ways of your test kit and of your sample to the lab
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Secure online login to view and download your results
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€395 · 60 minute results consultation included
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Results in 10–14 days
Results in 10–14 days
Adult Food Intolerance Testing
IgG Antibody 200+ Foods
Our comprehensive IgG testing analyses your blood sample against 200+ common foods to identify inflammatory triggers. Ideal for adults experiencing bloating, fatigue, skin issues, migraines, or digestive discomfort.
Results in 10–14 days
What's Included
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200+ foods tested in a single panel
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Simple finger-prick blood sample
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Detailed colour-coded results report
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Personalised elimination & reintroduction plan​
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Free shipping
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Suitable for ages 16+
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€395 · 60 minute results consultation included
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Results in 10–14 days
Children's Food Intolerance Testing
Gentle Paediatric Panel
Specially designed for younger clients, this gentle test identifies food sensitivities that may be contributing to behavioural issues, poor sleep, skin conditions, tummy troubles, and fussy eating patterns.
Results in 10–14 days
What's Included
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Child-friendly finger-prick method
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200+ foods tested
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Age-appropriate results explanation
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Family-friendly meal plan guidance
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Free shipping
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Suitable for ages 2+
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€395 · 60 minute Parent consultation included
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Results in 10–14 days
Children's Comprehensive Microbiome Analysis
Advanced Stool Analysis
Discover What's Happening Inside Your Child's Gut
Simple and stress free test for children.
Gain valuable insights into your child's digestive health with our advanced Children's Microbiome Test. This comprehensive DNA-based analysis explores the balance of beneficial gut bacteria and provides personalised recommendations to support your child's wellbeing from the inside out.
What's Included
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Understand your child's unique gut microbiome composition
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Gain insights into factors influencing digestion, immunity, and overall health
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Suitable for children experiencing digestive symptoms or parents wanting proactive health insights
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Free worldwide shipping
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​Suitable for children 2+
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€395 · 60-minute parent consultation included ·
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Results in 2–3 weeks
Results in 2-3 weeks
How it works
Simple Stress Free Process
Step 1
Book & Receive Kit
We'll send your testing kit directly to your door with clear instructions.
Step 2
Complete Your Sample
Follow the simple instructions at home. Blood tests use a quick finger-prick; microbiome tests use a stool sample kit.
Step 3
Lab Analysis
Your sample is analysed at an accredited laboratories.
UK laboratory (food intolerance testing)
German laboratory (microbiome testing)
Results are ready within 2–3 weeks depending on the test.
Step 4
Results & Action Plan
We walk through your results together and create a personalised nutrition plan to address your unique findings.
Before You Buy
Shipping & Delivery​
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Food Intolerance Tests are available in Ireland and the UK. All shipping and customs charges are included.
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Microbiome Tests can be shipped worldwide, with all postage costs included.
What’s included:
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A comprehensive results report.
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A 60-minute results consultation with Rachel to review your results, answer your questions, and create a personalised action plan.
Results Turnaround Times:
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Food Intolerance Tests: Results are available within 10-14 days.
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Microbiome Tests: Results are typically available within 2-3 weeks, as laboratory stool analysis requires additional processing time.
Not Sure Which Test Is Right for You?
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Book a free 45-minute discovery call, and we'll help you choose the most appropriate test based on your symptoms, goals, and health concerns.
Best sellers
Real Clients, Real Results
"There is no denying the difference I feel!  I have had literally no heartburn, indigestion or bloating for the last six weeks. My energy levels are so much higher, I have lost that groggy feeling completely. I have lost around 5 kilos. My hair and skin are better, I'm getting a big head from all the compliments! All in all, I can't thank you enough. It was definitely the right decision to seek help, now I am wondering why it took me so long to reach out. "
Emma C, Meath
Food Intolerance Test
"I recently had the need to test for food intolerances having fobbed it off for years. After finding Rachel Crowder Nutrition online, 3 days later Rachel was sitting in my kitchen taking a test! Offering free house calls if you live in Meath. Rachel came back to my home to go through the results in detail offering such useful advice on next steps. I would highly recommend Rachel to anyone!
Karen G, Meath
Food Intolerance Test
"After years of my son's tummy discomfort, I decided to order a food intolerance test. The results were eye-opening and led to makin a number of  changes to my son's diet. Since then, the improvement in my son has been remarkable. He's more energetic, happier, and the digestive issues have gone. I'm grateful for the insights the test provided and highly recommend Rachel and her services to any parent considering it for their child"