At-home food sensitivity tests

Yes — I looked at the current evidence, and the answer is a little counterintuitive:

Bottom line

There is currently no scientifically validated, general-purpose “food sensitivity” test that you can buy online and use at home to accurately identify all the foods causing symptoms.

In particular, I would not spend money on the popular mail-in IgG/IgG4 food sensitivity panels sold by companies such as Everlywell and similar services. The American Academy of Allergy, Asthma & Immunology (AAAAI) explicitly recommends against them. IgG to foods generally reflects exposure/tolerance, not that a food is causing symptoms.www.aaaai.org+1

The American College of Allergy, Asthma & Immunology's current patient guidance goes even further: it lists IgG food testing and home allergy testing kits among unproven tests, and says that home food-sensitivity panels can cause people to unnecessarily eliminate foods. It also notes that these home food-sensitivity tests have not been evaluated by the FDA.acaai.org

What I'd choose instead

It depends on what you mean by "sensitivity":

For example, hydrogen breath testing has an actual physiological basis: after consuming a measured carbohydrate dose, the test measures hydrogen produced when the carbohydrate isn't properly absorbed. NIDDK recognizes it for lactose, fructose and sucrose intolerance.www.niddk.nih.gov

For food allergy, the evidence is quite different. Current EAACI guidance supports targeted serum-specific IgE and/or skin-prick testing based on the suspected food, with an oral food challenge as the reference standard when the diagnosis is uncertain. pubmed.ncbi.nlm.nih.gov Importantly, an oral food challenge can cause a serious reaction and should not be attempted unsupervised at home.www.niaid.nih.gov

What about IgG tests?

This is the big one I'd avoid.

A typical commercial panel might tell you that you're "reactive" to dozens of foods. That sounds useful, but the underlying assumption is wrong. Food-specific IgG/IgG4 is commonly produced after exposure to foods, and higher IgG4 can actually be associated with immune tolerance. A major EAACI position paper concluded that IgG4 testing has no useful role in diagnosing food allergy or intolerance.www.aaaai.org+1

So if a $150–$300 test tells you you're "sensitive" to eggs, wheat, almonds, dairy, etc., that doesn't establish that any of those foods are causing your symptoms.

One particularly important exception: gluten

If your concern is gluten, don't simply buy a generic "food sensitivity" panel or go gluten-free first.

Celiac disease is a real, medically diagnosable condition. The usual initial test is tTG-IgA plus total IgA, and you generally need to be eating gluten for the antibody test to work properly.www.niaid.nih.gov+1

There are now OTC genetic tests for celiac-associated genes, but genetics cannot diagnose celiac disease; it can mainly help assess risk or rule it out in certain circumstances.celiac.org

My recommendation

If you're asking because you're experiencing GI symptoms, bloating, diarrhea/constipation, headaches, fatigue, skin symptoms, or brain fog after eating, I'd skip the broad "food sensitivity" panels altogether.

Instead, I'd identify the specific symptom pattern and choose the most scientifically appropriate test. For example:

• Dairy → lactose breath test
• Wheat/gluten → celiac evaluation before eliminating gluten
• Immediate hives/swelling/wheezing → allergist + targeted IgE testing
• Mainly GI symptoms with many suspected foods → structured elimination/rechallenge, rather than IgG testing

If you tell me what symptoms you're having, how soon they occur after eating, and your 3–5 most suspicious foods, I can narrow this down to the best specific at-home test(s) currently available in the U.S., including which brands I'd trust and which I'd avoid.