IdentifyYour Food Allergies & Food Sensitivities

Discover which foods are causing inflammation and impacting your health

How It Works

Step 1

Explore Free Nutrient Repletion Diet Plans

Explore our selection of 40+ Nutrient Repletion Diet Plans to see which one fits you best and to learn more about how foods can affect the body. Get access to food guides, whole food nutrient education, nutrient-dense recipes, and lists of our favorite health food brands at the grocery store.

Step 2

Identify Your Food Allergies & Sensitivities

Identify your food allergies and sensitivities by purchasing the P88 Dietary Antigen Test. This lab tests allergies and sensitivities to 88 different foods, so you know exactly which foods are contributing to inflammation and preventing you from reaching your health goals.

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Step 3

Learn How Foods Are Impacting Your Body

Schedule a consultation with a certified nutritionist to review your food allergy & sensitivity lab results, have your questions answered, and get personalized tips on how to remove food allergies and sensitivities from your diet without sacrificing flavor or crucial nutrients.

Nearly 44% of people are on a diet at any given time to lose weight or feel better.

But what if the foods you think are healthy are actually harming you? Without knowing what foods you’re allergic to or sensitive to, you could be exposing yourself to inflammation triggers every single day, making it harder to achieve your goals.

The real question is: Which foods are right for you?

Food reactions can come in many forms, and people often mistake food reactions for other symptoms. Some people are even misdiagnosed with conditions like IBS when food allergies and sensitivities are the true cause.

About Reactiv Foods

We’re nutritionists and food fanatics who have a passion for helping people identify their food allergies and food sensitivities. We know how hard it can be to sift through all of the different nutritional advice out there, finally find a diet you feel is going to work for you, only to still be left suffering with symptoms, inflammation, and a lack of progress. Food allergies and sensitivities are a common hidden cause of inflammation, and testing for them is the easiest and most effective way to know exactly what you should avoid so your body can thrive. Reactiv Foods wants to make food allergy and sensitivity testing accessible for everyone, so we can all reach optimal health naturally.

Getting Started Is Easy:

How Can Food Allergy and Sensitivity Testing with the P88 Dietary Antigen Test Benefit You?

Clarity & Peace of Mind

Many people live with daily discomfort without realizing food may be the root cause. The P88 Dietary Antigen Test identifies how your body reacts to specific foods, giving you clear answers instead of leaving you guessing. You can stop randomly eliminating foods and start making informed decisions that truly support your health.

Targeted Insights

This isn’t just a list of foods, it’s actionable insight. Your results reveal which foods may be contributing to inflammation, digestive distress, skin issues, fatigue, or other chronic symptoms. Instead of trying every new diet trend hoping for results, you’ll understand what your body uniquely needs, allowing you to take focused, effective steps forward.

Stop Guessing

Many people spend years experimenting with elimination diets, cutting out various foods, or following conflicting advice online which is frustrating and time-consuming. With the P88 Dietary Antigen Test, you get clear, personalized answers. No more second-guessing every meal. Just real results and a smarter path forward.

Improve Health Outcomes

Have you ever tried supplements, programs, or lifestyle changes that didn’t seem to work? Hidden food allergies and sensitivities are often the missing link. Our testing provides the insight needed to reduce inflammation, support digestion, and improve results, so you finally start moving in the right direction.

Smarter Nutrition Decisions

Generic nutrition advice doesn’t work for everyone. When you know exactly which foods your body tolerates and which it doesn’t, your choices become simpler and more strategic. Meals become easier to plan, symptoms become easier to manage, and optimal health becomes far more achievable.

* Not available in NY, NJ, RI

How Can Food Allergy and Sensitivity Testing with the P88 Dietary Antigen Test Benefit You?

Clarity & Peace of Mind

Many people live with daily discomfort without realizing food may be the root cause. The P88 Dietary Antigen Test identifies how your body reacts to specific foods, giving you clear answers instead of leaving you guessing. You can stop randomly eliminating foods and start making informed decisions that truly support your health.

Targeted Insights

This isn’t just a list of foods, it’s actionable insight. Your results reveal which foods may be contributing to inflammation, digestive distress, skin issues, fatigue, or other chronic symptoms. Instead of trying every new diet trend hoping for results, you’ll understand what your body uniquely needs, allowing you to take focused, effective steps forward.

Stop Guessing

Many people spend years experimenting with elimination diets, cutting out various foods, or following conflicting advice online which is frustrating and time-consuming. With the P88 Dietary Antigen Test, you get clear, personalized answers. No more second-guessing every meal. Just real results and a smarter path forward.

Improve Health Outcomes

Have you ever tried supplements, programs, or lifestyle changes that didn’t seem to work? Hidden food allergies and sensitivities are often the missing link. Our testing provides the insight needed to reduce inflammation, support digestion, and improve results, so you finally start moving in the right direction.

Smarter Nutrition Decisions

Generic nutrition advice doesn’t work for everyone. When you know exactly which foods your body tolerates and which it doesn’t, your choices become simpler and more strategic. Meals become easier to plan, symptoms become easier to manage, and optimal health becomes far more achievable.

* Not available in NY, NJ, RI

What Are We Testing For?

IgE - Immediate Food Allergies

IgE antibodies are responsible for classic, immediate food allergy reactions. When your immune system mistakenly identifies a food as harmful, IgE triggers symptoms that can happen quickly such as swelling, hives, itching, and difficulty breathing. Measuring IgE helps identify foods that may cause rapid and potentially serious allergic responses.

IgG - delayed Food Sensitivities

IgG antibodies are linked to delayed immune reactions that can occur hours or even days after eating certain foods. These responses are often more subtle and may contribute to symptoms like bloating, headaches, fatigue, joint pain, brain fog, skin issues, and digestive discomfort. Because these reactions are delayed, they’re often difficult to identify without testing.

C3D - Inflammatory Amplification

C3D is part of the complement system, which is a component of your immune system that can amplify inflammation. When triggered alongside food sensitivities, C3D can intensify symptoms and increase the body’s inflammatory response. Elevated C3D levels may indicate that certain foods are triggering a stronger immune reaction than expected.

IgG4 - Immune Regulation & Balance

IgG4 plays a regulatory role in the immune system and helps balance IgE-driven reactions. Healthy levels of IgG4 can help control allergic responses by reducing histamine release. However, both low and excessively high levels may be associated with immune imbalance. Measuring IgG4 provides additional insight into how your body responds to specific foods and whether poor immune function may be a factor.

What Are We Testing For?

IgE - Immediate Food Allergies

IgE antibodies are responsible for classic, immediate food allergy reactions. When your immune system mistakenly identifies a food as harmful, IgE triggers symptoms that can happen quickly such as swelling, hives, itching, and difficulty breathing. Measuring IgE helps identify foods that may cause rapid and potentially serious allergic responses.

IgG - delayed Food Sensitivities

IgG antibodies are linked to delayed immune reactions that can occur hours or even days after eating certain foods. These responses are often more subtle and may contribute to symptoms like bloating, headaches, fatigue, joint pain, brain fog, skin issues, and digestive discomfort. Because these reactions are delayed, they’re often difficult to identify without testing.

C3D - Inflammatory Amplification

C3D is part of the complement system, which is a component of your immune system that can amplify inflammation. When triggered alongside food sensitivities, C3D can intensify symptoms and increase the body’s inflammatory response. Elevated C3D levels may indicate that certain foods are triggering a stronger immune reaction than expected.

IgG4 - Immune Regulation & Balance

IgG4 plays a regulatory role in the immune system and helps balance IgE-driven reactions. Healthy levels of IgG4 can help control allergic responses by reducing histamine release. However, both low and excessively high levels may be associated with immune imbalance. Measuring IgG4 provides additional insight into how your body responds to specific foods and whether poor immune function may be a factor.

Pricing

Here’s What Our Clients Have To Say

The Top 12 Health Issues Associated with Food Allergies and Sensitivities

Irritable Bowel Syndrome (IBS) and Chronic Gut Issues

Recurring gas, cramping, diarrhea, or constipation may be connected to specific foods triggering an immune response. Identifying those foods can help reduce digestive distress and support better gut function.

Skin Conditions (Eczema, Acne, Rashes)

Your skin reflects what’s happening internally. Food-triggered immune reactions can contribute to inflammation that shows up as breakouts, redness, rashes, itching, or chronic irritation.

Migraines and Chronic Headaches

Certain foods may activate immune pathways that contribute to inflammation and vascular changes associated with headaches. For some individuals, removing trigger foods significantly reduces frequency and severity.

Fatigue, Low Energy, & Poor Sleep

If you constantly feel drained, hidden food sensitivities may be contributing to ongoing immune activation and systemic inflammation, which can leave you feeling exhausted and tired.

Brain Fog & Difficulty Concentrating

Inflammatory responses triggered by food can impact cognitive function, focus, and memory. Many people report improved mental sharpness after identifying and removing trigger foods.

Joint Pain & Muscle Aches

Chronic, unexplained aches may be worsened by inflammatory reactions to certain foods. Reducing immune-triggering foods can support improved mobility and decrease joint and muscle inflammation.

Mood Changes, Anxiety, & Irritability

The gut and immune system are closely connected to brain function and mood stability. Food-triggered inflammation may contribute to mood swings, irritability, and increased stress responses.

Sinus Congestion & Chronic Inflammation

Frequent congestion, post-nasal drip, or sinus pressure can sometimes be linked to food-related immune reactions, especially in those with underlying allergies.

Autoimmune Flare-Ups

For individuals with autoimmune conditions, certain foods may act as immune triggers that worsen inflammation and exacerbate symptoms. Identifying these triggers can be an important part of a broader management plan.

Unexplained Weight Fluctuations

Chronic inflammation and digestive disruption can interfere with metabolism, nutrient absorption, and hormone balance, making weight regulation more difficult.

Behavior Changes

Chronic inflammation from food sensitivities and allergies can interfere with neurological function and contribute to ADHD, Bipolar Disorder, and other behavior change symptoms.

Nutrient Malabsorption

Inflammation from food sensitivities and allergies can disrupt gut microbiome health and decrease nutrient absorption. Removing inflammatory food triggers can increase nutrient levels in the body. 

The Top 12 Health Issues Associated with Food Allergies and Sensitivities

Irritable Bowel Syndrome (IBS) and Chronic Gut Issues

Recurring gas, cramping, diarrhea, or constipation may be connected to specific foods triggering an immune response. Identifying those foods can help reduce digestive distress and support better gut function.

Skin Conditions (Eczema, Acne, Rashes)

Your skin reflects what’s happening internally. Food-triggered immune reactions can contribute to inflammation that shows up as breakouts, redness, rashes, itching, or chronic irritation.

Migraines and Chronic Headaches

Certain foods may activate immune pathways that contribute to inflammation and vascular changes associated with headaches. For some individuals, removing trigger foods significantly reduces frequency and severity.

Fatigue, Low Energy, & Poor Sleep

If you constantly feel drained, hidden food sensitivities may be contributing to ongoing immune activation and systemic inflammation, which can leave you feeling exhausted and tired.

Brain Fog & Difficulty Concentrating

Inflammatory responses triggered by food can impact cognitive function, focus, and memory. Many people report improved mental sharpness after identifying and removing trigger foods.

Joint Pain & Muscle Aches

Chronic, unexplained aches may be worsened by inflammatory reactions to certain foods. Reducing immune-triggering foods can support improved mobility and decrease joint and muscle inflammation.

Mood Changes, Anxiety, & Irritability

The gut and immune system are closely connected to brain function and mood stability. Food-triggered inflammation may contribute to mood swings, irritability, and increased stress responses.

Sinus Congestion & Chronic Inflammation

Frequent congestion, post-nasal drip, or sinus pressure can sometimes be linked to food-related immune reactions, especially in those with underlying allergies.

Autoimmune Flare-Ups

For individuals with autoimmune conditions, certain foods may act as immune triggers that worsen inflammation and exacerbate symptoms. Identifying these triggers can be an important part of a broader management plan.

Unexplained Weight Fluctuations

Chronic inflammation and digestive disruption can interfere with metabolism, nutrient absorption, and hormone balance, making weight regulation more difficult.

Behavior Changes

Chronic inflammation from food sensitivities and allergies can interfere with neurological function and contribute to ADHD, Bipolar Disorder, and other behavior change symptoms.

Nutrient Malabsorption

Inflammation from food sensitivities and allergies can disrupt gut microbiome health and decrease nutrient absorption. Removing inflammatory food triggers can increase nutrient levels in the body. 

FAQs

What are the differences between food allergies, food sensitivities, and food intolerances?

Food allergies involve an immune system IgE antibody reaction which typically causes immediate symptoms. Food sensitivities involve an immune system IgG antibody reaction which can cause delayed symptoms. Food intolerances are non-immune reactions which involve the body not having adequate amounts of digestive enzymes to break down various foods.

What does the P-88 Dietary Antigen Test for?

The P-88 Dietary Antigen Test by Precision Point Diagnostics measures over 350+ immune complexes. This test measures food allergy and food sensitivity antibodies of IgE, IgG, IgG4, and C3D immune pathways for 88 different foods.

Why is the P-88 Dietary Antigen Test different than other food sensitivity tests?

Most food sensitivity tests only measure IgG antibodies and not IgE, IgG4, and C3D immune pathways. By not testing these other immune pathways in the body, you may not get a complete picture of how foods are impacting your health.

What is the difference between IgE blood testing and skin-prick food allergy testing?

Both types of testing can detect food allergy-specific antibodies but differ in method, speed, and safety. Skin prick testing can be administered in an allergist office where a patient receives tiny skin pricks with an allergen to determine if there is a reaction. An IgE blood test measures IgE antibodies to various foods to determine if there is an inflammatory reaction in the body. Both types of testing can provide answers on food allergies.

Is the P-88 Dietary Antigen Test a blood test?

Yes. The P-88 Dietary Antigen Test is a blood spot test. You’ll receive your P-88 Dietary Antigen Test kit from Precision Point Diagnostics in the mail within 7-10 business days upon ordering from Reactiv Foods and completing your intake form. Follow the directions within the kit on how to take a finger prick test for a blood specimen. No phlebotomist blood draw is required.

How do I take my blood specimen?

Please click here to learn more about taking your blood spot specimen.

How long does it take to receive my lab results?

Once the lab receives your blood specimen, it takes approximately 14 business days to receive results from the test. You’ll receive a message from Reactiv Foods on how to view your P-88 Dietary Antigen Test results when they are available.

Is the P-88 Dietary Antigen Test through Reactiv Foods covered by insurance?

No. Reactiv Foods is committed to providing the best quality services. We do not participate in any insurance plans, including Medicare or Medicaid, and we do not accept any health insurance payment for our products and services. Our services are 100% self-pay by you, and you agree to be responsible for full payment of the listed price of the products and services.

How old do I have to be for the P-88 Dietary Antigen Test?

Clients must be at least 2 years of age or older.

What's included in the purchase of the Reactiv Foods Allergy & Sensitivity Lab Test Bundle?

You’ll receive a P-88 Dietary Antigen Test kit from Precision Point Diagnostics and a sample 1-week informational meal plan from Reactiv Foods with recipes and a grocery list based on your lab results.

Do you offer refunds?

No. All sales are final. No refunds or exchanges are provided.

What's included in the optional Nutritionist Consultation?

The Reactiv Foods Nutritionist Consultation includes a nutritionist review of your P-88 Dietary Antigen Test results. This educational lab review explains the differences between your food IgE, Ig4, IgG, and C3D immune pathway results and what they can mean to your overall health goals.

Does Reactiv Foods diagnose, treat, cure, or manage health conditions?

No. Services provided by Reactiv Foods are purely for diagnostic assistance purposes only and do not create a physician-patient relationship, and do not constitute medical care or diagnosis or treatment of any condition, disease, or illness.

Does Reactiv Foods diagnose, treat, cure, or manage anaphylactic causing food allergies?

No. Services provided by Reactiv Foods do not diagnose, treat, cure, or manage anaphylactic-based food allergies. We encourage each person to discuss your lab results with your medical provider or allergist if you’re concerned with severe food allergy symptoms such as anaphylactic shock.

*Reactiv Foods is a nutrition technology and food educational content company and not a laboratory or medical provider. All laboratory and medical services are provided by independent third parties. These laboratory and medical service providers set their own pricing. Although Reactiv Foods may facilitate easy access to certain laboratory and medical service providers on your behalf, Reactiv Foods does not recommend or refer you to any healthcare providers, and you are free to choose any healthcare provider and to continue to use Reactiv Foods’ services. Reactiv Foods does not offer medical advice, laboratory services, a diagnosis, medical treatment, or any form of medical opinion, through our services or otherwise. Reactiv Foods’ services are not a substitute for medical care, medical advice, and/or a detailed discussion with your primary care physician or other licensed provider. If you have any questions regarding any laboratory results or other information that you access through Reactiv Foods, we recommend that you discuss those questions with a primary care physician or other licensed provider. All material, information, data, and content that Reactiv Foods provides is strictly for general information purposes. Reactiv Foods pricing includes technology and service fees charged by Reactiv Foods, educational lab review consultations with a nutritionist, educational and non-medical meal planning services, as well as access to limited prepaid laboratory and other services provided by third parties, and paid to such third parties on your behalf. Itemization of all fees are available upon request. Certain items and services require additional payment that are not included in Reactiv Foods pricing. For other important information regarding the services provided by Reactiv Foods, please see terms of service.

Contact Us

Whether you have questions about our services, need support, or want to share your feedback, our dedicated team is here to assist you every step of the way.