Your Body Knows, We Help You Listen.

You, decoded.
Get wellness insights from 1,000+ possible food sensitivities, nutrient response patterns, and aspects of gut wellness.

4.6*

2, 834 Ratings

500k+

Clients Worldwide

72*

Hour Turnaround Time

100%

Satisfaction Guaranteed

USA’s #1

At Home Intolerance Test

We focus on your body's blueprint for a healthier life

Your body already holds the data — we help you translate it. Our unique wellness-technology approach helps you learn about possible food sensitivities, nutrient response patterns, and gut wellness insights, so you can make smarter choices.*
Listen To Your Body

Your body can send subtle signals long before you feel off — from bloating and fatigue to changes in skin, mood, or weight. Understanding these patterns can help you make more informed choices to support your overall wellness.*

Choose the Right Test

Choose from our Wellness Test Kits, designed to explore 1,000+ items — including potential food sensitivity response patterns, nutrient interactions, and gut-wellness insights — to help you better understand how your body may be responding.*

Collect Your Sample

Our at-home kit makes it simple. Just follow the step-by-step instructions to collect a small hair sample and send it to our certified facility. From there, we use advanced wellness technology to interpret signals coming from your hair sample, offering wellness insights to possible food sensitivities, nutrient response patterns, and gut wellness — helping you make more informed choices about your wellness.*

Receive Personalized Insights

You’ll receive a detailed wellness report showing how your body may be responding to 1,000+ foods and nutrients — mapping what seems to fuel you and what may be holding you back.

Your results also include data-driven supplement insights with personalized guidance on nutrients and dosing ranges aligned to your profile, to help you move forward with confidence.*

Take Action with Guided Support

Turn your results into meaningful change. Use them to fine-tune your diet, daily wellness habits, and supplement choices so you’re not guessing — you’re building a body that works with you. Our customer care manager is here for you now, and long after.

Listen To Your Body
Choose the Right Test
Collect Your Sample
Receive Personalized Insights
Take Action with Guided Support

Choose the test that meets you where you are.

Whether you’re looking to explore possible food sensitivities, learn how your body may be responding to key vitamins, or gain deeper insight into your gut wellness, we have a test designed to help give you clarity.
Food Sensitivity, Vitamins & Gut Health Test
1000+ items tested

Food Sensitivity, Vitamins & Gut Health Test

Our most comprehensive wellness test, designed to explore food, nutrients, along with patterns tied to gut balance and digestive comfort.
Food Sensitivity & Vitamins Test
750+ items tested

Food Sensitivity & Vitamins Test

Find the foods that fit your body, the nutrients that may support you, and where gentle detox or lifestyle adjustments could help you feel more balanced.*
Food Sensitivity Test
350+ items tested

Food Sensitivity Test

Explore which foods and drinks your body may find harder to digest — and discover a way of eating that truly supports your wellness.*

Find Your Perfect Test!

Not sure where to start? Take our quick quiz to see which option aligns best with your wellness goals.

Tune Into the Signs Your Body Is Sending

Ever wondered how certain foods might be affecting how you feel? Explore possible connections between your food choices and your everyday wellness.*
Less Bloat, More Life

Less Bloat, More Life

Decode Your Digestion

Decode Your Digestion

Find Your Missing Energy

Find Your Missing Energy

Rethink Your Weight Story

Rethink Your Weight Story

Glow From the Inside

Glow From the Inside

Calm the Fire Within

Calm the Fire Within

Clear the Fog

Clear the Fog

Move with Ease

Move with Ease

Silence Your Head

Silence Your Head

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Hear From Our Happy Customers

See how our wellness tests have empowered thousands.
Abigail Molldrem

Abigail Molldrem

Sarah Granetz

Sarah Granetz

Kelly

Kelly

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Meet Our Founders

Darin & Samantha Upchurch

Darin and Samantha Upchurch, are the husband-and-wife team behind Advanced Food Intolerance Labs (AFIL) — united by a shared mission: to help people learn about what’s really going on inside their bodies so they can take control of their wellness.

Together, they built AFIL to bridge the gap between frustration and understanding — combining an advanced at-home wellness testing approach, with personalized support to help you make smarter choices about what you eat, how you live, and how you support your body every day.*

Frequently Asked Questions

Find quick answers to your questions and get clarity on everything you need to know about our tests, process, and results.

Our wellness sensitivity approach looks at how your body may interact with certain foods, helping you notice possible response patterns tied to how you feel day to day.

It doesn’t diagnose allergies or medical conditions — instead, it gives you clarity and direction to make confident, personalized choices about your nutrition and wellness.*

We use a small hair sample because it’s known to be a stable, non-invasive, and convenient way to gather long-term wellness information. Hair may naturally retain a record of your body’s exposure to different elements over time, helping us identify possible wellness patterns related to foods, nutrients and digestive wellness. It’s quick and simple to get started — and our turnaround time is among the fastest in the industry, so you can receive wellness insights without the wait.*

Don’t worry — color, treatments, or bleach won’t affect your wellness analysis.

Just make sure your hair is clean and free of products like gels, sprays, or anything metallic (except for using scissors when taking your sample.)

Shampoo and conditioner are fine to use before collecting your sample.

No hair, no problem! We also accept facial or body hair.

Please provide 10 strands at least 0.5 inches long. If the hair is shorter, provide 20 strands instead.

Hair must be clean and free of products or any metallic residues. You may use scissors to take your hair sample.

If you choose to adjust your diet based on your results, consider a short trial period — for example, a few weeks (we often suggest up to 12 weeks) — to see how your body may respond to those changes. During that time, pay attention to how you feel and note any shifts in your overall well-being.*

Always consult with your medical professional before making any changes to your diet and health routine.

No. If you’re trying to understand why your body reacts right now — within minutes or hours — allergy testing is the right tool for that job. It looks at how the immune system responds (typically through IgE or IgG antibodies) and always requires a blood sample, not a hair sample. These reactions can range from mild to severe, which is why ruling out allergies with a qualified healthcare professional is always the smart first step.*

That’s not what we do. Our tests don’t measure immune or antibody activity and can’t detect allergies — nor are they intended to. Instead, they explore possible long-term wellness patterns related to foods, nutrients, or environmental factors that may influence how you feel over time.*

While allergies happen fast, sensitivities may develop gradually — sometimes over days, weeks, or months. Understanding these patterns can help you make more informed decisions about your diet, lifestyle, and daily wellness.*

The fine print:
This is a general wellness tool, not a medical test or diagnosis. It’s not designed to treat, cure, or prevent disease. Always work with a qualified healthcare provider for anything medical — especially allergy concerns.*

Absolutely! Children under the age of 6 experience rapid developmental changes, and their food and wellness responses can shift more frequently as they grow. For this reason, it’s often helpful to consider periodic re-testing to observe possible wellness patterns over time.*

Note: This is not an allergy test. Always consult a qualified healthcare provider for any allergies, medical conditions, or health concerns.*

Begin the Journey to a Healthier You

The path to better well-being starts here. Gain meaningful insights and make more informed wellness choices.*

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