I use the USBioTek Laboratory. USBiotek’s least expensive food sensitivity blood test is $159, for 96 food groups, for IgG antibodies. USBiotek’s most expensive test is $429, for 208 food groups, for both IgG and IgA antibodies. The main advantage of the more expensive test is that it may provide more non-reactive food choices that you may consume, and it may detect more foods to which you are sensitive. But even the least costly test is quite valuable. USBioTek can send you either the finger prick test that you can do at home, or the serum test that requires your blood being drawn at your local hospital or lab. These prices are the wholesale doctor prices paid by the patient directly to USBioTek for which the doctor receives no compensation. Some insurance plans may cover the cost of the test. USBioTek ships their test kits in the USA and Canada. After you return the kit to USBioTek, it takes about 10 days to get the results emailed to you.
At first glance, it may appear straightforward to evaluate food sensitivity test results. Just avoid the offending foods, right? Not exactly.
The safest course of action is to choose the foods that (1) were tested, (2) were eaten in the last month, and (3) showed low sensitivity. The reason for this course of action is as follows. If you tested negative for a food that you have not eaten recently, you might be sensitive to it but the test is not showing it as reactive because you have not had recent exposure to it. Over time, weeks to months, the antibody levels will decrease to sensitive foods if those foods are avoided. So if you are sensitive to dairy, but have not eaten dairy for several months, your test may not show any reactivity to dairy.
Keep in mind that IgG antibodies have a half-life of 25 days; IgA antibodies have a half-life of 5 days. This means that only very recent exposure will show IgA reactivity, whereas less recent exposure will show IgG reactivity.
In addition, even if gluten foods are not shown as reactive, they should be avoided to prevent gut damage which can result in developing sensitivity to even more food groups.
If you cannot get a good test, the best option is to avoid the most common allergic foods which are dairy (cow milk, cheese, butter, etc), eggs, gluten (wheat, oats, barley and rye), cane sugar, and yeast. If you have easily observable signs and symptoms such as a skin rash or arthritis, these conditions will normally worsen within 72 hours of eating an offending food and lessen within 4 days of avoiding the offending food.
The most common pitfalls are supplements which may contain fillers to which you are sensitive. Sometimes the capsule of the supplement can be the culprit. Medicines can also contain allergic fillers. Spices, and sauces are also known to be allergens and must be avoided unless shown to be non-reactive by the testing. More detais can be found at the Hidden Food Ingredients
Additional valuable information is available to help you deal with food sensitivities and autoimmune issues. You may request this additional information on this form and it will be sent to you by email: Additional Information
A patient’s autoimmune diagnosis is based various immune-related tests, and on which signs and symptoms occur in the organs being damaged by antibodies resulting from the particular food allergy. Here are some examples: Autoimmune Conditions
The following are just a few of the published studies in medical journals that support the idea of food allergies as a causative mechanism in autoimmune conditions.
Delayed Immunomodulatory Effect of Cow Milk-Free Diet in Ménière’s Disease. J Am Coll Nutr. 2018 Feb;37(2):149-153. https://www.ncbi.nlm.nih.gov/pubmed/29087236
Allergic and Immunologic Features of Ménière’s Disease. Otolaryngol Clin North Am. 2011 Jun;44(3):655-66. https://www.ncbi.nlm.nih.gov/pubmed/21621052
A vegan diet free of gluten improves the signs and symptoms of rheumatoid arthritis: the effects on arthritis correlate with a reduction in antibodies to food antigens. Rheumatology (Oxford) 2001 Oct;40(10):1175-9. https://pubmed.ncbi.nlm.nih.gov/11600749/
Association between food allergy and ankylosing spondylitis: An observational study. Medicine (Baltimore). 2019 Feb;98(6). https://pubmed.ncbi.nlm.nih.gov/30732197/
Food-specific IgGs Are Highly Increased in the Sera of Patients with Inflammatory Bowel Disease and Are Clinically Relevant to the Pathogenesis. Internal Med. 2018 Oct 1;57(19):2787-2798. https://pubmed.ncbi.nlm.nih.gov/29780153/
Slipping through the Cracks: Linking Low Immune Function and Intestinal Bacterial Imbalance to the Etiology of Rheumatoid Arthritis. Ann Saudi Med. Nov-Dec 2016;36(6):386-390. https://pubmed.ncbi.nlm.nih.gov/25861466/
Prevalence of IgG-mediated food intolerance among patients with allergic symptoms. Autoimmune Dis. 2015;2015:636207. https://pubmed.ncbi.nlm.nih.gov/27920409/
Food Intolerance Prevalence in Active Ulcerative Colitis in Southwest China. Asia Pac J Clin Nutr. 2016;25(3):529-33. https://www.ncbi.nlm.nih.gov/pubmed/27440687
Food Exclusion Based on IgG Antibodies Alleviates Symptoms in Ulcerative Colitis: A Prospective Study. Inflamm Bowel Dis. 2018 May 16. https://www.ncbi.nlm.nih.gov/pubmed/29788288