Not recommended

TEST PASSPORT · REVIEWED JULY 2026

Food sensitivity IgG panels

A popular test we will not sell.

Food-specific IgG often reflects exposure or tolerance, not disease. Major allergy organizations recommend against using these panels to diagnose food allergy or intolerance.

Gut, allergy & exposure diagnostic testing visualization — FOOD IGG / DECISION GUIDE

ACCESSAt homeFinger-prick blood

TURNAROUNDVariesProvider and location dependent

RELATIVE COST$$–$$$Total downstream cost matters

COMMERCE STATUSDo not sellEvidence explainer only

HOW TO USE THIS PAGE

Decide whether this test deserves a place in your plan.

01
Confirm the question
Be clear about what decision the result would change before ordering.
02
Check fit and preparation
Review who it helps, who should pause and how to protect the quality of the signal.
03
Plan the response
Know what you will do with a normal, abnormal or unclear result.

Check whether it fits →See preparation

01 / WHO SHOULD TAKE IT

Fit the test to
the person.

Testing is useful when the result can change a real decision. These are educational selection criteria, not a diagnosis or personal order.

GOOD-FIT QUESTIONS

No routine diagnostic population
People who already bought one and need help avoiding unnecessary restriction can review it with a qualified clinician/dietitian

PAUSE BEFORE ORDERING

Diagnosing allergy, intolerance, inflammation or ‘leaky gut’
Building a long elimination list
Testing children without a specialist-directed question

02 / SIGNAL VS. STORY

What it tells you.
What it cannot.

THE SIGNAL

That IgG antibodies to foods were detected

Often, that the food has been eaten

THE LIMIT

It does not validate symptoms

Large panels generate many positives

Restriction can worsen nutrition, anxiety and quality of life

03 / MARKERS + RANGES

Read the panel
without chasing flags.

The report should show its own method, units and laboratory reference interval. Clinical decision thresholds may be different from a lab interval. We do not invent a universal “optimal” range where authoritative guidance does not support one.

01Food-specific IgG/IgG4—non-diagnostic for allergy or intolerance

Use the laboratory unit and method, then interpret with symptoms, trend and the decision this marker can change.

MEN, WOMEN + LIFE-STAGE CONTEXT

The correct range is personal context—not pink versus blue numbers.

Where biology differs, we call it out. Clinical interpretation should also reflect organs present, hormone therapy, pregnancy, age, medications and health history.

Women

Restrictive diets can be especially consequential in pregnancy, lactation and eating-disorder risk.

Men

Restrictive diets can reduce energy, fiber and nutrient adequacy without solving the symptom.

04 / PREPARATION

Protect the quality
of the signal.

The best assay cannot rescue the wrong timing, wrong specimen or wrong question. Follow the ordering clinician and laboratory instructions when they differ from this general guide.

01Before buying

Do not buy. Start with a symptom history and qualified evaluation.

02If you have a report

Do not remove dozens of foods abruptly; review symptoms and nutrition risk.

03Better path

Use targeted allergy testing for immediate reactions and clinician-guided evaluation for GI symptoms.

REPEAT CADENCENever as a routine diagnostic or wellness test.

05 / AFTER THE RESULT

Turn the number
into a next step.

01
Return to the actual symptom pattern
02
Reintroduce unnecessary restrictions with qualified support
03
Use validated tests only when the history points to them

DO NOT WAIT ON A CONSUMER TEST

Immediate breathing difficulty, throat symptoms or faintness needs emergency allergy care

Major weight loss or fear-driven restriction needs clinical support

06 / MODERN BIO SELECT

Evidence before revenue.

Revenue stops where the evidence does. This category is excluded from Modern Bio Select.

DO NOT SELL