How antibody tests map to the clinical question

When people say “allergy panel,” they often mean very different things. Clinically, two blood tests get conflated:

Specific IgE: indicates sensitization to an allergen and, when paired with history, helps diagnose IgE‑mediated allergy and guide therapy (including immunotherapy) for environmental triggers. Major societies endorse targeted, history‑driven IgE testing—not indiscriminate panels.
Specific IgG/IgG4: reflects prior exposure/tolerance, not allergy. Leading organizations explicitly advise against using food‑specific IgG/IgG4 to diagnose “food sensitivities” or allergies.

Summary table

Test	What it measures	Appropriate use	Society guidance
Allergen‑specific IgE (blood or skin)	IgE sensitization	Targeted to allergens suggested by history to confirm environmental allergy or evaluate suspected IgE‑mediated food reactions	Use history‑driven testing; avoid indiscriminate panels.
Food‑specific IgG/IgG4	Immune exposure/tolerance	Not for diagnosing food allergy/sensitivity	Not recommended for diagnosis.

Why Wyndly focuses on environmental specific IgE

Wyndly treats environmental (not food) allergies with physician‑guided sublingual immunotherapy (SLIT). To build a safe, effective plan, we identify relevant environmental triggers via specific IgE testing interpreted alongside your history. Our CLIA‑certified, at‑home test measures IgE to 40+ common indoor/outdoor allergens (pollen, dust mites, pet dander, molds), and our doctors design treatment from those results. We do not test for or treat food allergies.

Key reasons we do not offer “food panels”:

Food IgG panels are not diagnostic and can drive unnecessary, restrictive diets and anxiety.
Even food‑specific IgE should not be ordered as a broad screen; testing should be guided by a suggestive history to avoid false‑positive cascades.

If you suspect a food allergy

For suspected IgE‑mediated food reactions (e.g., hives, vomiting, wheeze within minutes to hours of eating), the diagnostic sequence is: focused history → targeted skin prick or specific IgE testing (if indicated) → oral food challenge when appropriate. The double‑blind, placebo‑controlled food challenge is the diagnostic gold standard; open or single‑blind challenges are commonly used in practice when safe.

Action steps:

Seek a local, board‑certified allergist to evaluate suspected food allergy and discuss supervised oral food challenges. The AAAAI’s “Find an Allergist/Immunologist” directory is a good starting point.
Avoid ordering or relying on commercial “food sensitivity” (IgG) panels; they are not validated for diagnosis and may lead to unnecessary dietary restriction.

What Wyndly’s environmental test covers

Our at‑home blood test measures IgE to the 40 most common environmental allergens so our physicians can tailor SLIT to your profile:

Pets: cat, dog, horse dander
Grasses/weeds/trees: Bahia, Bermuda, timothy, rye, ragweed, oak, birch, maple, cedar, mountain cedar, and more
Indoor: dust mites (Dermatophagoides spp., Blomia), molds (Alternaria, Aspergillus, Cladosporium, Penicillium), cockroach, mouse

Practical guardrails for testing

Start with the story: test only when results will change management.
For environmental rhinitis/asthma: targeted IgE testing supports avoidance measures and immunotherapy planning.
For food: do not use food IgG/IgG4. Consider targeted food IgE only if the history suggests an IgE‑mediated reaction; confirm with oral food challenge as needed.

FAQs

Does Wyndly test or treat food allergies? No. Wyndly focuses on environmental allergies and does not test for or treat food allergies.
Are “food sensitivity” blood tests accurate? No—food‑specific IgG/IgG4 is a marker of exposure/tolerance, not clinical allergy. Major societies advise against these tests.
When should someone get food IgE testing? Only when the history suggests an IgE‑mediated reaction to a specific food; never as an indiscriminate “panel.”
What is the gold standard for diagnosing food allergy? A supervised oral food challenge.

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Allergy panels vs. food panels: why Wyndly focuses on environmental specific IgE