IgG tests promise to reveal food sensitivities. But are they science or science-ish?


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  1. Kira B

    We tried keeping a food reaction because of severe non IgE food allergies (red cheeks/GI issues/rashes/eczema) Mainstream testing and allergists were zero help. We stumbled upon ALCAT food sensitivity test and FINALLY were able to get relief for symptoms. Allergens included black pepper and broccoli which were frequently consumed, impossible to figure out with a food diary and when removed truly brought relief to years of chronic, visible symptoms. Yes–there is not a lot of science to these alternative food tests–but sometimes they help individuals when mainstream medicine fails to bring relief or even acknowledgement of the problem. One GI doctor told me “We deal with death and disease not health and wellness.” So if your reactions are causing you to be unwell and not healthy but don’t fall into the death and disease catagory often it is outside the scope of what MDs in the US deal with. We did the ALCAT every year or so until my sons gut and immune system healed. I am truly grateful for the parent who showed me the ALCAT food allergy panel when mainstream doctors were failing us. I understand doctors reluctance to believe in these tests. But as a parent–it was very helpful to us and halted non IgE food reactions. Interesting article. Thanks for overview.

    • Nikki

      Well said Kira! My family has had similar benefits from the Alcat test.

  2. Julie Bolin

    Wow! Thank you for this article. I’m just coming off of a 21 day elimination of the foods that my IgG test said I was sensitive to. (I thought it was bogus because it contained almost every healthy food that I typically eat – like lettuce and cabbage) I wish I had done a little more research because this test was very expensive (out of pocket was $250 but they billed my insurance $5000).

    • Saskia

      Hi Julie,
      I have just been doing an elimination diet as well, IBS, and symptoms actually got worse instead of better. Did you notice a difference in your symptoms?

      Hope what ever you are dealing with gets better soon!

      Saskia

  3. Ro Fundum

    I’m on the fence about the info in this article. In some ways it makes sense. But the statement, “…… IgG may simply indicate that the food is in the diet.” does not make sense to me. I had the test done, and it came back as “highly sensitive” to whey, hemp, and kidney beans. I often did whey protein with hemp seed hearts for omega 3’s. So in that respect the above statement makes sense. But I rarely eat kidney beans….by rarely I mean maybe once a year.
    Also, my test came back as moderate sensitivity (just barely below the ‘high’ sensitivity range) to papaya & pineapple. I do not eat pineapple because I don’t like it. I ate one bite of papaya, one time several years ago. I didn’t like it either and I never eat it.
    Furthermore, many of the foods I do eat a lot of, are on my low sensitivity list. Things such as eggs (I eat them almost every day), berries (I eat daily), all nuts & seeds (I eat daily), and my favorite cheese (cheddar) which I eat often. My results showed that I could continue to eat these foods freely, they were very low on my reaction list. So it seems that the correlation is not consistent.
    Of interest, is the fact that once I got my results I immediately quit doing my whey/hemp protein drinks. Within a few days, the pain that had been in my shoulder for the last couple of years completely let up and I now have complete range of motion again. The only thing I did different was quit the whey protein (and hemp seed hearts).

    So bottom line, although this article is interesting, I cannot help but wonder if there is some valid science supporting the IGg test that is just not yet mainstream. The author of this article does make some sense, but I’m not ready to discount the clinical usefulness of the food sensitivity test.

  4. Colin

    I am just about to have my test done. My family doctor prescribed medicine that was harmful to me and suggested I continue on long term it long term even though it wasn’t relieving any symptoms. I went to a Naturopath that had me supplement a couple of vitamins etc and after 3 days I am feeling marginally better. He suggested I get the IGG test done and see if instead of putting something foreign into my body (hardcore pills) maybe I just need to remove something (a food or two). It is a no brainer in my opinion. Mainstream doctors do not seem to care about the root causes just symptom relief at any expense to overall health. My opinion…

  5. Scott Rozell

    Paying for Food Specific IgG allergy testing is the first mistake people make. This testing is performed by EVERY lab in the U.S.. What that means is that they are covered by most insurance companies when using a repeatable lab and they are ordered by a doctor.
    Next is, nobody is eating a whole food diet. You have no idea what is in processed foods. Natural Flavors is a very common ingredient in processed foods. No identification of the “Flavors” is required on the label.
    Then trusting any labeling on foods. The FDA clearly states that up to 20ppm of Wheat is allowed in Certified Gluten Free labeled foods. Therefore, those GF labeled foods are actually NOT gluten free.
    You really need to understand the food supply in the U.S.. FDA does a poor job of regulating. Tobacco companies own 80% of all food manufacturers. That right there should scare everyone.

  6. Colin

    Got my results today.

    I have an extremely elevated sensitivity to 40 of the 120 foods tested and another 6 are mildly elevated. Funny thing is I also have no elevated sensitivity to 6 foods that I am sensitive too and always have been. I am doubting the merits of this test… at least as far as my blood is concerned. I have another very expensive apt with my naturopath Dr. in a few days and will see how he recommends that I proceed. I am just about to go and eat my lunch and then I read my emailed blood report. My lunch has 5 sensitivity elevated foods in it, seriously 5.

    #DiscouragedBeyondBelief
    #InsaneFromTheVein
    #WhatDidIJustPay$400For?

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