Food Sensitivity vs. Allergy Testing: What Home Kits Do and Don't Measure

No category in at-home testing has a wider gap between what the box implies and what the test measures. "Find the foods that don't work for you" is the pitch; an IgG antibody panel is the product. Those are not the same thing, and an honest comparison of these kits has to start with the science vocabulary — because once the terms are straight, the buying decision gets much clearer.

Allergy: IgE, medical supervision, not a kit

A true food allergy is an immune response involving IgE antibodies. It can be immediate and, at the severe end, life-threatening — anaphylaxis is an emergency, and this paragraph is exactly why this article cannot be medical advice. Allergy evaluation — skin testing, blood IgE testing (MedlinePlus's allergy blood test page explains what those measure), supervised oral food challenges — happens under medical supervision with an allergist, informed by history. Professional allergy organizations such as the American Academy of Allergy, Asthma & Immunology (AAAAI) publish patient guidance on this, and the consistent message is that allergy testing is interpreted alongside clinical history, not read off a printout.

No mail-in kit on this page diagnoses food allergy. The reputable services say so in their own fine print. If your concern is allergy — particularly if you have ever had a serious reaction — the comparison you need is between allergists, not kits.

"Sensitivity": IgG, and a genuine scientific debate

What home food-sensitivity kits measure is IgG reactivity — a different antibody class. Here is the honest state of the science, as reflected in published positions from allergy organizations: IgG antibodies to foods are commonly present in people without any symptoms, and elevated IgG to a food often reflects ordinary exposure and tolerance rather than a problem. For that reason, groups like the AAAAI have cautioned against using IgG panels to diagnose food problems, and some professional bodies internationally have recommended against their diagnostic use outright.

That does not make the kits fraudulent — they generally measure what they say they measure, in CLIA-certified laboratories (the federal lab-quality program CMS administers). It makes the interpretation contested. A high-IgG result for wheat is a data point of debated meaning, not an instruction to cut wheat. Anyone considering significant diet changes off the back of one — especially eliminating whole food groups — is squarely in talk-to-a-professional territory (a physician or registered dietitian), because unnecessary elimination diets carry their own downsides. The FDA's consumer material on direct-to-consumer tests makes the general version of this point: DTC results are not a basis for changing anything important without a provider.

The kits, compared as what they are

With the science framing set, the products can be compared honestly on price, markers, and experience:

Everlywell sells the category's best-known kit — finger-prick collection, published at $199 at the time of writing for the flagship Food Sensitivity Test, results in an app-guided portal that reports IgG reactivity across dozens of foods. The service's own materials describe results as a starting point for discussion, which is the right framing.

myLAB Box carries food-sensitivity testing inside its broader discreet mail-in menu (published kit prices across its range commonly $99–$209). If you are already comparing its other tests, consolidation is the argument.

Both are mail-in, both publish their food lists and prices, and both sit on our services table with current published numbers. On this one, the comparison verdict is genuinely secondary to the category verdict — and for what a well-spent $199 could otherwise buy in this space, see the hormone and STD panel price guides.

The lookalikes: celiac disease and intolerances

Two conditions hide behind "sensitivity" language often enough to deserve their own paragraphs. Celiac disease is an autoimmune condition triggered by gluten with a real, medical diagnostic pathway — blood testing and clinical evaluation ordered by a clinician — and an important catch the patient-facing material from major medical centers emphasizes: going gluten-free before testing can interfere with the results. If celiac is the question, that is a physician conversation before any diet change, and no IgG kit answers it. Lactose intolerance is different again: not immune-mediated at all, but an enzyme shortfall, evaluated through its own clinical tests. The pattern to notice is that the conditions with the clearest answers run through clinicians, while the IgG panel measures the thing with the murkiest meaning. Sorting your actual question into the right lane — allergy, celiac, intolerance, or curiosity — is worth more than any kit purchase, and it is exactly the sorting a comparison site cannot do for you.

The comparison that actually matters here

• If the question is allergy — reactions, hives, swelling, anything scary — the answer is an allergist, and public resources from the AAAAI, MedlinePlus, and major medical centers explain what real allergy evaluation involves. No kit.
• If the question is curiosity about IgG reactivity, and you understand the debated meaning, the kits above do measure it, and price/food-list/experience are the comparison points.
• If the question is digestive symptoms, that is a clinical conversation first — conditions with real diagnostic pathways (celiac disease is a good example, and testing for it is medical territory) can hide behind "sensitivity" framing.

We compare testing services for a living, and this is the category where our advice is most often "understand what it measures before you spend anything." Screening is not diagnosis anywhere in consumer testing, and here even the screening's meaning is debated. The kits are cheap relative to a misunderstanding acted on. Read the marker science, then decide with eyes open — and keep the clinical questions with clinicians.

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This article is for informational purposes only. This is not medical advice — consult a healthcare provider about testing decisions and what results mean for you. Some links on this page are affiliate links; we may earn a commission at no extra cost to you, and it never changes a comparison. LabScored is an independent publisher, not a healthcare provider or laboratory.