House Dust Greer H1 IgG Biomarker Testing
It measures IgG antibodies to house dust extract to support exposure and symptom context, with easy ordering and Quest-based lab access via Vitals Vault.
With Vitals Vault, you have access to a comprehensive range of biomarker tests.
House Dust Greer H1 IgG is a blood test that looks for IgG antibodies your immune system has made in response to a standardized house dust extract (often referred to as “Greer” extract). Your result can add context when you are trying to connect indoor exposures with symptoms or when you are tracking how your environment changes over time.
This test is not the same as classic “allergy testing,” which usually focuses on IgE antibodies and immediate reactions like hives, wheezing, or anaphylaxis. IgG results are more commonly used as an exposure marker and should be interpreted alongside your symptoms, your home or workplace conditions, and other labs when appropriate.
Because interpretation can be nuanced, it helps to review your result with a clinician—especially if you are considering major environmental changes, starting new treatments, or you have asthma or other chronic respiratory conditions.
Do I need a House Dust Greer H1 IgG test?
You might consider a House Dust Greer H1 IgG test if you spend a lot of time indoors and you are trying to understand whether house dust exposure could be part of your symptom pattern. People often look into this when they notice recurring nasal congestion, sinus pressure, cough, throat clearing, headaches, fatigue, or “brain fog” that seems worse at home, at work, or during certain seasons.
This test can also be useful when you are already making environmental changes—such as improving ventilation, controlling humidity, upgrading filtration, or addressing visible dust buildup—and you want a lab data point to pair with symptom tracking. It is sometimes ordered as part of a broader workup when you and your clinician are sorting out overlapping possibilities like allergic rhinitis, non-allergic rhinitis, asthma triggers, chronic sinus issues, or irritant exposures.
You may not need this test if your main concern is immediate-type allergy (sneezing fits, itchy eyes, hives, wheeze right after exposure). In that case, IgE-based testing or skin testing is usually more directly aligned with diagnosis and treatment decisions.
Testing is meant to support clinician-directed care and shared decision-making. Your result should not be used by itself to diagnose an allergy, a mold illness, or any specific condition.
This is a laboratory-developed test performed in a CLIA-certified lab; results are for educational and clinical correlation and are not a standalone diagnosis.
Lab testing
Order House Dust Greer H1 IgG and get a clear, trackable baseline you can retest after environmental changes.
Schedule online, results typically within about a week
Clear reporting and optional clinician context
HSA/FSA eligible where applicable
Get this test with Vitals Vault
Vitals Vault lets you order House Dust Greer H1 IgG without needing to coordinate a separate lab requisition visit. You complete checkout, schedule your blood draw at a participating lab location, and then view your results in one place.
If you are unsure how to interpret an IgG result, PocketMD can help you turn the number into next steps. You can ask questions like what “high” might mean in your situation, which companion tests are worth considering, and when it makes sense to retest after changing your indoor environment.
This test is most helpful when you pair it with a clear plan: what symptoms you are tracking, what exposure changes you are making, and what timeframe you will use to reassess. Vitals Vault makes it easy to reorder the same test later so you can compare trends rather than guessing from a single snapshot.
- Order online and schedule a local blood draw
- Results you can revisit and trend over time
- PocketMD support for plain-language interpretation
Key benefits of House Dust Greer H1 IgG testing
- Adds an objective data point about immune recognition of house dust exposure.
- Helps you connect symptom timing with indoor environments (home, office, travel).
- Supports before-and-after tracking when you change filtration, cleaning routines, or humidity control.
- Can complement IgE testing when your symptoms do not fit a classic immediate allergy pattern.
- May help prioritize which indoor exposures to investigate further with your clinician.
- Provides a baseline you can compare against future results if symptoms recur after improvement.
- Works well with PocketMD to translate results into practical follow-up questions and retest timing.
What is House Dust Greer H1 IgG?
House Dust Greer H1 IgG measures the amount of IgG (immunoglobulin G) antibodies in your blood that bind to a standardized house dust extract. “Greer” refers to a commonly used source of allergen extracts used in laboratory assays, which helps keep the test material consistent from run to run.
IgG antibodies are part of your immune system’s longer-term “memory” response. A positive or higher IgG level generally suggests that your immune system has been exposed to components found in house dust and has mounted an antibody response. House dust is a mixture, and it can contain particles from many sources, including dust mite material, insect debris, animal dander, fibers, and other indoor particulates.
Because IgG can reflect exposure and immune recognition rather than immediate allergy, the most useful interpretation comes from combining your lab result with your symptom pattern, your environment, and (when relevant) other testing such as IgE-based allergy evaluation or respiratory assessments.
IgG is different from IgE
IgE antibodies are more closely tied to immediate allergic reactions and are often used to diagnose allergic rhinitis and allergic asthma triggers. IgG antibodies can rise with repeated exposure and may or may not correlate with symptoms. That is why an IgG result is usually treated as one piece of context rather than a definitive answer.
What the test does (and does not) tell you
This test does not identify the exact component within house dust that is driving the signal, and it does not prove that house dust is the cause of your symptoms. It can, however, support a structured approach: identify likely exposures, make targeted changes, and then reassess symptoms and labs over time.
What do my House Dust Greer H1 IgG results mean?
Low House Dust Greer H1 IgG
A low result generally means your blood shows little to no IgG binding to the house dust extract used in the assay. This can happen if you have limited exposure, if your immune system has not formed a measurable IgG response, or if the specific dust components you react to are not well represented in the extract. If you still have strong symptoms, your clinician may consider IgE testing, evaluation for non-allergic triggers (like irritants), or looking at other indoor exposures.
In-range (typical) House Dust Greer H1 IgG
An in-range result is common and often reflects either low-level exposure or an immune response that is not elevated compared with the lab’s reference population. If your symptoms are mild or intermittent, this may support focusing on practical environmental steps first, such as improving ventilation and reducing dust reservoirs. If symptoms are persistent, the next step is usually to interpret this result alongside your history, exam, and any companion testing rather than assuming the lab is “normal” and stopping the workup.
High House Dust Greer H1 IgG
A high result suggests a stronger IgG antibody response to the house dust extract, which often aligns with more frequent or more intense exposure. It does not automatically mean you have an IgE-mediated allergy, and it does not prove that house dust is the sole cause of symptoms. Many people use a higher result as a prompt to review indoor air quality, humidity (dust mites thrive with higher humidity), cleaning practices, bedding and upholstery, and filtration, then retest later to see whether the number and symptoms move together.
Factors that influence House Dust Greer H1 IgG
Your result can be influenced by how much time you spend in a given environment, recent changes like moving, renovations, new carpeting, or travel, and seasonal shifts that change indoor humidity and ventilation habits. Immune system differences matter too, including age, immune-suppressing medications, and certain chronic conditions that affect antibody production. Lab methods and reference ranges can vary, so it is best to compare results from the same lab over time when you are trending. Finally, symptoms can be driven by irritants (smoke, fragrances, cleaning chemicals) even when IgG is low, so the lab should be interpreted in context.
What’s included
- House Dust (Greer) (H1) Igg
Frequently Asked Questions
Is House Dust Greer H1 IgG an allergy test?
It is an immune response test, but it is not the same as classic allergy testing. IgE testing is more directly tied to immediate allergic reactions. IgG to house dust is usually interpreted as a marker of exposure and immune recognition, and it needs symptom and clinical correlation.
Do I need to fast for a House Dust IgG blood test?
Fasting is usually not required for IgG antibody testing. If you are ordering other labs at the same time (such as metabolic markers), follow the preparation instructions for the full set of tests you are getting that day.
What does a high house dust IgG level mean?
A higher value generally suggests your immune system has made more IgG antibodies that bind to the house dust extract used in the assay, which often goes along with more frequent exposure. It does not prove you have an IgE-mediated allergy or that house dust is the only cause of symptoms. Use it as a prompt to review exposures and track whether symptoms improve when the environment changes.
Can I use this test to diagnose dust mite allergy?
Not by itself. Dust mite allergy is typically evaluated with dust mite–specific IgE blood testing or skin testing, plus your symptom history. House dust IgG can be a complementary data point, but it is not a definitive diagnostic test for dust mite allergy.
When should I retest after changing my home environment?
A practical approach is to retest after you have maintained the change long enough for exposure to stabilize, often around 8–12 weeks. The right timing depends on what you changed (for example, bedding and humidity control vs. a move to a new home) and what symptoms you are tracking. PocketMD can help you choose a retest window that matches your plan.
Why might my symptoms be strong even if my IgG is low?
Symptoms can be driven by irritants (smoke, fragrances, cleaning products), non-allergic inflammation, infections, reflux, or other triggers that do not raise IgG to house dust. Also, the extract used in the test may not capture the specific indoor component that affects you most. If symptoms persist, discuss IgE testing and a broader evaluation with your clinician.