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Food Sensitivity Testing

As we all know, our health begins with our nutrition and what types of foods we feed our bodies. Even though you may be consuming foods that are clean and wholesome, there are particular foods that can induce elevated levels of inflammation due to having an underlying food sensitivity.

Patients tend to think a Food Sensitivity Test and Food Allergy Test are the same thing… with the increasing knowledge in physical symptoms people experience from different foods, many people would like to better understand the true cause, but do not clearly understand the true differences between a food allergy and a food sensitivity.

Let’s take a quick look at what’s actually being tested when a patient has a food allergy and or a food sensitivity. IgA, IgG, and IgE are antibodies within our immune system that are produced in response to foreign invaders such as parasites, bacteria, and viruses, but can also respond to overexposure of certain foods we are sensitive to.


A food allergy is an Immediate reaction to food that is IgE-mediated, which can result in hives, throat swelling and even anaphylaxis (i.e., severe allergic reaction causing airway closure, low blood pressure, and even shock). The most common anaphylactic reactions occur due to certain foods, medications and insect stings.


    A food sensitivity on the other hand is typically more of a delayed reaction and relates to both IgA and IgG-mediated reactions.

    What’s the difference between IgA Antibody and IgG Antibody?

    IgA Antibody

    IgA antibodies are specific to the mucous membranes, stomach, and intestinal linings. When your gut becomes inflamed or disrupted by excessive IgA-mediated food exposures, it becomes leaky, which can result in the inability to absorb vital nutrients and vitamins, and even disrupt our beneficial gut bacteria. This disruption of your gut lining, allows other food antigens to travel throughout the body. Your body then forms antibodies to these antigens, which can result in a large immune system response (“fight”), resulting in increased inflammation, and even setting off an autoimmune response to your own body.

    IGG Antibody

    IgG antibodies tend to have more of a delayed systemic effect. By delayed, let’s say you are extremely sensitive to dairy products, but your symptoms may not appear for another 48-72 hours later. So for example, you had milk in your coffee 3 days ago. This morning you wake up and have a slice of dry toast and black coffee, then develop a migraine later that morning. A lot of people would think, it has to be the gluten from the bread that had that morning, but in reality they are experiencing a delayed response to the dairy they had in their coffee 3 days prior. This is why attempting to eliminate foods based upon when their symptoms arise can become very confusing!

    Normal Gut vs Leaky Gut

    This is a great image of what happens when we continue to consume foods or medications that destroy our protective gut lining. A healthy gut works like a cheese cloth, allowing only nutrients through, but keeping larger food particles and pathogenic bacteria, yeast and parasites out. In a leaky gut, the tight junctions are loosened so undigested food particles and pathogens can get through and activate the immune system, causing inflammation and food sensitivities.

    What Kind of Symptoms are seen when you have Food Sensitivities?

    Muscular/Joint Pains
    Weight Gain
    Skin Rashes
    Concentration or Memory Issues
    Poor Immune System
    Hormonal Disruption

    So how do you test for a Food Sensitivity?

    We utilize the company Biotek, which uses a finger prick blood spot test to look for certain food antibodies you are sensitive to.
    How many foods can you test for? – I have sent you sample reports…I would like each of these as a hyperlink so people can view each sample report

    • 208-Food Panel
    • 144-Food Panel
    • 96-Food General Panel
    • 96-Food Vegetarian Panel
    Do I have to go to the lab for testing?

    No, not all! We can ship the test directly to you as well as perform the test right here in the office!

    How long does it take to receive my results?

    Typically around 3-4 weeks to receive your test results

    Once I receive my results, how do I know what foods to remove?

    Dr. Hogan will thoroughly walk you through your results and discuss how best to remove certain foods from your diet.

    What to do When Test is Positive for Food Sensitivities?

    During a consultation with Dr. Justin Hogan, he works directly with you on customizing an elimination plan that is specific for each of your food sensitivities. When eliminating foods from your diet, it’s best to begin with the foods you are most sensitive to first. Depending on your results and how many foods you are sensitive to, it’s best to begin slow, but try to be very diligent with removing these foods for at least 6 weeks.

    27 foods sample test

    50 foods sample test

    96 foods sample test

    We are currently offering virtual consultations. There are two options for purchasing a Food Sensitivity Testing Kit. You are able to purchase just the kit itself and receive the results directly to your inbox, or you’re able to receive a Consultation with Dr. Justin Hogan and review a nutrition game plan based upon your results.


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    The content of this website is for informational purposes only. It is not intended to diagnose, treat, cure, or prevent any medical condition, nor should it be used as a substitute for medical advice from a qualified physician. The information contained herein is presented in summary form only. It should not be considered complete and should not be used in place of a visit, call, consultation or advice from a physician. Only a qualified physician can determine if you qualify for treatment.