What is the best food sensitivity test that is not a scam?

Short answer: there isn’t a single reliable “food sensitivity” home kit. The most trustworthy approach is a clinical evaluation by a provider with validated tests tailored to the problem — specifically skin-prick testing and/or serum specific‑IgE testing (for true allergic reactions), celiac serology for suspected celiac disease, hydrogen breath testing for lactose/SIBO, or an elimination diet supervised by a dietitian for suspected non‑IgE intolerances.

Why: many direct‑to‑consumer “food sensitivity” panels that measure IgG antibodies (the common “IgG food sensitivity” tests) are not validated to diagnose food reactions. Professional allergy organizations say IgG often reflects exposure/tolerance and not pathological sensitivity, so those tests can lead to unnecessary restrictions.

Recommended, evidence‑based options (by name and why):

• Skin‑prick testing performed by a board‑certified allergist

  • Why: fast, inexpensive, clinically validated for IgE‑mediated allergy and interpreted in context of your history. Best first step for hives, anaphylaxis, immediate reactions.

• Serum specific‑IgE testing using ImmunoCAP (Thermo Fisher) through major labs such as Quest Diagnostics, LabCorp, or Mayo Clinic Laboratories

  • Why: ImmunoCAP is a standardized, widely used lab method for specific IgE; useful when skin testing isn’t possible or to quantify sensitization. Must be interpreted by a clinician.

• Supervised oral food challenge (clinic/hospital)

  • Why: the gold standard to confirm or rule out food allergy when tests and history are unclear.

• Celiac testing: tissue transglutaminase IgA (tTG‑IgA) plus total IgA — available at Quest/LabCorp/Mayo

  • Why: validated test for celiac disease; important to do before removing gluten from diet.

• Lactose intolerance: hydrogen breath test performed by GI labs

  • Why: validated for lactose malabsorption.

• Non‑IgE GI symptoms / suspected FODMAP sensitivity: structured low‑FODMAP elimination and reintroduction guided by a registered dietitian

  • Why: no blood test reliably diagnoses FODMAP intolerance; supervised diet and reintroduction are the accepted method.

Tests/companies to avoid for “food sensitivities”:

• IgG food panels marketed direct to consumers (examples: Everlywell Food Sensitivity IgG panels, Vibrant Wellness IgG panels, YorkTest IgG panels, and similar). These are widely criticized by allergists for poor clinical utility.

What to do next:

1. Write down your symptoms, timing relative to food, and any severe reactions.
2. If you have immediate-type reactions (hives, swelling, throat tightness, breathing trouble), see an allergist urgently.
3. For chronic GI symptoms, start with your primary care provider or a gastroenterologist (they can order celiac serology, breath tests) and/or a registered dietitian for a low‑FODMAP trial.
4. If allergy is suspected, ask for skin‑prick testing or ImmunoCAP specific‑IgE testing and, if needed, a supervised oral food challenge.

If you want, tell me your symptoms and whether reactions are immediate or delayed, and I can suggest the most appropriate next test and how to find a local allergist or GI clinic.