Lab
Mediator Release Test (MRT®)
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The best test & protocol for food sensitivities and reducing overall inflammation
Discover not just what you're reactive to, but what you're not. The MRT test evaluates 176 different food and chemical sensitivities. Our protocol emphasizes what you should eat, rather than just what to avoid, helping you build an anti-inflammatory diet tailored to your unique needs.
Why We Love This
It’s not just about avoiding foods—it’s about helping you identify which foods do work for your body. The MRT test empowers you to build a diet that reduces inflammation, boosts energy, and improves your overall well-being, even when other elimination diets haven’t delivered the results you need
What to Expect
We will mail the test kit directly to your house.
Blood Draw: Please note this test kit must be drawn by a phlebotomist. It is not an at-home test kit.
Blood Draw: Please note this test kit must be drawn by a phlebotomist. It is not an at-home test kit.
Finding a Lab: The MRT test cannot be drawn at Quest labs. You can typically have this test drawn at any lab that does “outside draws.” We suggest calling ahead before showing up. Some people also seek out a mobile phlebotomist in their area. Here is a directory to search for a lab near you:
Detailed instructions will be sent to you in a confirmation email post purchase.
Restrictions: Not available in New York
**Please note that all test kits purchased through Root must be sent in to the appropriate lab within 6 months of purchase.**
Details
Your MRT test purchase includes:
- Testing for 176 food and chemical sensitivities. The kit will be mailed to you within 7-10 business days.
- Root Community Resources:
- A Root proprietary digital 20+ page interpretation and meal planning guide
- MRT interpretation video
We have seen the most success using the Mediator Release Test (MRT) with the following conditions:
- Irritable Bowel Syndrome with Diarrhea (IBS-D)
- Hashimoto’s Thyroiditis
- Rheumatoid Arthritis
- Migraines/headaches
- Fibromyalgia
- Weight gain due to inflammation
- Various skin problems such as eczema, acne, and dry/itchy skin
This test might be for you if:
- You are highly motivated to make major dietary changes for at least 6 weeks.
- You are ready to feel better FAST. Most people see a 50-75% reduction in their initial symptom score within 14 days on the protocol.
- There are no foods you wouldn’t be willing to give up for a short period of time (we are talking bread, alcohol, chocolate, and cheese, among many other foods.)
Results
After the lab receives your sample, it typically takes 5-10 business days to process the results. Expect a total turnaround time 2-3 weeks. The Root team will upload your results to your secure health portal, and you will be alerted when they are ready for viewing.
Sample Report
The MRT test sample report provides a detailed breakdown of your reactivity to 176 foods and chemicals, categorized by levels of sensitivity—low, moderate, or high. It also highlights the specific triggers to avoid and offers actionable insights to help you build an anti-inflammatory diet focused on safe, nourishing foods tailored to your unique needs.

Sample Report
The MRT test sample report provides a detailed breakdown of your reactivity to 176 foods and chemicals, categorized by levels of sensitivity—low, moderate, or high. It also highlights the specific triggers to avoid and offers actionable insights to help you build an anti-inflammatory diet focused on safe, nourishing foods tailored to your unique needs.
Need extra support and guidance?
Add on visits with a Root doctor as needed via your membership. We'll review the results in detail with you one on one and answer any questions you may have.
"I did the MRT food sensitivity test and food plan for my Rheumatoid Arthritis. I am now in the final phase of the food plan and I am 99.9% pain free. I cannot thank the Root team enough for helping me get my life back!"
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