Introduction

Clinicians and patients often ask whether molecular, component‑resolved diagnostics (CRD) for pets (for example, the cat allergen Fel d 1) are required to start immunotherapy. This page explains what “components” mean, what Wyndly’s test panel includes today, how to share any prior CRD you already have, and how our physicians map your results—whether extract‑based or component‑based—into a safe, effective sublingual immunotherapy (SLIT) plan. For background on our pet programs, see pet allergy immunotherapy and dog allergy immunotherapy.

What “components” mean (and when they help)

• Definition: Component‑resolved testing measures IgE to individual allergenic proteins (molecules) from an animal (e.g., a specific cat protein) rather than to a full dander extract.

• Why clinicians use it: CRD can add nuance (e.g., cross‑reactive proteins vs truly species‑specific proteins), which sometimes informs counseling about exposure and prognosis.

• Cat example: The dominant cat allergen protein Fel d 1 is frequently implicated in clinical disease and is referenced throughout our cat‑allergy education. Our physicians routinely treat cat dander allergy with SLIT that targets the relevant proteins present in standardized extracts. See our guidance on cat allergy and Fel d 1 in how to get rid of a cat allergy and the best way to treat your cat allergy.

What Wyndly’s test panel includes today

• Extract‑based, CLIA‑certified specific IgE blood test: Our at‑home test detects the 40+ most common environmental allergens, including pet danders (cat, dog, horse) along with pollens, dust mites, and molds. It is a finger‑prick sample processed in a CLIA‑certified lab and reviewed by a Wyndly physician. See details on our at‑home allergy test and allergy test landing page.

• Scope for pets: Cat dander, dog dander, and horse dander are included in our standard extract‑based panel. Examples are listed across our testing pages (allergen list, survey).

• Why we use extracts for pets: Extract‑based testing and treatment reflect the protein mixture patients encounter in real life and align with how SLIT is formulated and studied. See our clinical overview in immunotherapy and our immunotherapy guide.

Already have component results? Upload them

If you’ve completed CRD (or any prior allergy testing) within the last five years, you can upload those results for physician review and skip re‑testing.

• How to submit: Use our Existing Allergy Test Review. A Wyndly doctor will review your CRD or extract report, your history, and your goals, then recommend next steps.

• What we do with CRD: We interpret components in context (history, exposures, comorbidities). CRD is not required to start SLIT, but when available it can clarify cross‑reactivity patterns and help focus counseling—even though SLIT itself is formulated from standardized extracts.

How we map results (extracts or components) to SLIT

Wyndly’s SLIT uses standardized allergy extracts and clinically supported dosing. We personalize a plan using your allergy profile (test results plus history), then dispense daily under‑the‑tongue drops under physician oversight.

• Cat dander: If you’re sensitized to cat, we design SLIT that targets the dominant cat proteins present in the extract (including Fel d 1). See our program pages for cats and pets: cat allergy immunotherapy and pet allergy immunotherapy.

• Dog dander: For dog sensitization, we use dog dander extracts within multi‑allergen SLIT when appropriate. See dog allergy immunotherapy.

• Multi‑allergen support: When clinically indicated, we can address multiple environmental allergens (pets, pollens, dust, molds) together. See our clinical overview in immunotherapy and FAQ pages (e.g., allergy test insurance landing).

• Safety and evidence: SLIT has been shown in major reviews to be effective and to have a favorable safety profile for home dosing; see summaries in our immunotherapy and SLIT vs shots pages.

At‑a‑glance: testing vs treatment inputs we accept

Practical guidance for patients and clinicians

• You do not need CRD to begin SLIT with Wyndly. Our standard workflow uses extract‑based IgE plus history to personalize care. Allergy test landing

• If you already have CRD, upload it; we’ll incorporate it into your plan. Existing Test Review

• Education on pet allergens: For cats (including Fel d 1 context), see how to get rid of a cat allergy and the best way to treat your cat allergy. For dogs, see dog allergy immunotherapy.

• What we treat: Environmental allergies only (pets, pollens, dust, molds). We do not treat food allergies. See pet allergy immunotherapy.

FAQs

• Do I need Fel d 1 measured to start? No. While Fel d 1 is a key cat protein, our extract‑based testing and SLIT target the clinically relevant proteins present in standardized cat dander extracts. See cat allergy immunotherapy and how to get rid of a cat allergy.

• Will component results change my SLIT formula? They can add nuance, but SLIT is formulated from validated extracts. Component data may influence counseling and prioritization but is not mandatory. See immunotherapy.

• How soon might I feel better on SLIT? Many patients notice improvement within 4 weeks to 6 months, with durable benefits after a multi‑year course. See timelines on pet allergy immunotherapy and pollen allergy immunotherapy.

Related Wyndly programs (cross‑links)

• Treat dog allergies at home: dog allergy immunotherapy

• Treat pet allergies broadly: pet allergy immunotherapy

• How SLIT compares to shots: SLIT vs allergy shots