Allergy & Inflammation

What Does the Allergy & Inflammation Blood Panel Include?

Regional Environmental Allergy Testing

A major advantage of this panel is that the environmental allergy blood test is matched to geographic region.

Labcorp divides the United States into regional respiratory profiles because pollen and environmental exposures vary substantially by location.

Depending on the region, testing commonly includes allergens such as:

• Dust mites
• Cat dander
• Dog dander
• Cockroach
• Mouse
• Oak
• Cedar
• Elm
• Maple
• Birch
• Ragweed
• Grasses
• Alternaria mold
• Aspergillus
• Cladosporium
• Penicillium

The exact allergens and Labcorp test number depend on your geographic location.

Why the Allergy & Inflammation Blood Panel Includes Eosinophils

The CBC with differential — Labcorp #005009 provides both the percentage and absolute number of eosinophils.

Eosinophils are particularly useful in an allergy-oriented assessment because they may increase with:

• Environmental allergies
• Allergic asthma
• Eczema and atopic disease
• Certain medication reactions
• Parasitic infection
• Eosinophilic gastrointestinal disorders
• Other immune conditions

An elevated eosinophil count does not identify the specific allergen, but when eosinophilia occurs together with positive allergen-specific IgE results, the findings can provide a clearer picture of active allergic burden.

Total IgE vs Specific IgE Allergy Testing

Total IgE and allergen-specific IgE provide different information.

Total IgE estimates the overall amount of IgE antibody circulating in the blood. It can be elevated in atopic disease, but a normal result does not rule out an allergy.

Allergen-specific IgE determines whether the immune system has produced IgE antibodies directed against individual substances such as dust mites, cats, dogs, grasses, weeds, trees or molds.

For that reason, the regional respiratory profile is considerably more useful than total IgE alone when the practical question is:

“What environmental exposures might actually be triggering symptoms?”

Why hs-CRP Is Included in the Allergy & Inflammation Blood Panel

Allergy testing identifies IgE-mediated sensitization, but patients with chronic symptoms often have more than one source of inflammation.

High-sensitivity CRP — Labcorp #120766 provides a broader measure of low-grade systemic inflammatory activity.

This can help determine whether the clinical picture involves primarily allergic sensitization or whether a larger inflammatory burden may also be present.

This distinction can be useful in patients with:

• Fatigue
• Brain fog
• Metabolic dysfunction
• Persistent inflammatory symptoms
• Poor recovery
• Sleep disturbance
• Environmental or toxic burden
• Chronic immune activation

hs-CRP does not identify the source of inflammation, but it can help determine whether further investigation is appropriate.

Allergy, Inflammation and Brain Function

Allergic symptoms are not limited to sneezing and congestion.

Persistent allergic and inflammatory signaling can interfere with sleep, increase physiologic stress, and contribute to fatigue and reduced cognitive performance.

In children, significant allergy burden may occur alongside:

• Sleep disruption
• Irritability
• Poor attention
• Sensory reactivity
• Behavioral changes
• Fatigue
• Developmental stress

In adults, common associated concerns can include:

• Brain fog
• Fatigue
• Insomnia
• Anxiety or increased irritability
• Headaches
• Poor recovery

The Allergy & Inflammation Blood Panel does not establish that allergy is the cause of these symptoms. Its purpose is to determine whether allergic sensitization and inflammatory activity are present and deserve attention within the larger treatment plan.

Allergy, Oxidative Stress and Methylation

Persistent immune activation can increase oxidative stress and metabolic demand.

Repeated allergic inflammation may increase requirements for:

• Antioxidant defense
• Glutathione production
• Tissue repair
• Mitochondrial energy
• Immune regulation

Within a Walsh-oriented or epigenetic assessment, this can be relevant when inflammation is acting as an additional stress on a patient with:

• Undermethylation
• Elevated SAH
• Low SAM-to-SAH ratio
• Mitochondrial stress
• Low antioxidant reserve
• Copper/zinc imbalance

The panel does not measure methylation directly. Instead, it helps identify an inflammatory or allergic burden that may be interfering with recovery or increasing biochemical demand.

Allergy & Inflammation Blood Panel for Mold Concerns

The regional respiratory profile commonly includes several molds, such as Alternaria, Aspergillus, Cladosporium and Penicillium.

This can help determine whether there is an IgE-mediated allergic sensitization to common environmental molds.

When Should Food Allergy Testing Be Added?

Food-specific IgE testing is best used selectively rather than automatically adding a broad food panel to every allergy evaluation.

Targeted food IgE testing may be useful when there is a reproducible history of symptoms following a particular food, including:

• Hives
• Swelling
• Wheezing
• Immediate gastrointestinal symptoms
• Consistent eczema flares
• Other rapid allergic reactions

Testing foods without a supportive clinical history can identify sensitization that is not clinically meaningful and may lead to unnecessary dietary restriction.

For this reason, selected food-specific IgE testing is better offered as an add-on based on symptoms and history.

When Is ESR Useful?

ESR, or sedimentation rate, is a broad and nonspecific inflammatory marker.

It may be useful when symptoms raise concern for:

• Autoimmune disease
• Chronic inflammatory disease
• Persistent systemic inflammation
• Certain infections
• Other inflammatory conditions

For a straightforward allergy evaluation, ESR often adds less useful information than the regional allergen profile, eosinophils and hs-CRP.

For that reason, ESR #005215 is better used as an optional add-on when the history suggests broader inflammatory or autoimmune disease.

Who May Benefit From the Allergy & Inflammation Blood Panel?

This panel may be particularly useful for patients with:

• Seasonal allergies
• Chronic nasal congestion
• Sneezing
• Itchy or watery eyes
• Asthma-type symptoms
• Eczema
• Elevated eosinophils
• Environmental sensitivity
• Possible mold allergy
• Pet-related symptoms
• Sleep disruption associated with congestion or allergy
• Fatigue or brain fog
• Irritability or attention concerns
• Unexplained low-grade inflammatory burden

What Information Will the Allergy & Inflammation Blood Panel Provide?

The panel can help answer:

• Is there evidence of environmental IgE sensitization?
• Which regional allergens are most relevant?
• Is total IgE elevated?
• Are eosinophils elevated?
• Does the pattern support an allergic or atopic process?
• Is low-grade systemic inflammation also present?
• Could environmental triggers be contributing to sleep, fatigue or inflammatory symptoms?
• Would targeted food allergy, mold, gastrointestinal or additional inflammatory testing be appropriate?

How Results May Help Guide an Individualized Plan

When clinically relevant allergens are identified, results can help guide practical interventions such as:

• Reducing exposure to important environmental triggers
• Dust-mite control
• Pet exposure strategies
• Pollen avoidance during peak seasons
• Evaluation of mold or damp environments
• Appropriate allergy treatment
• Consideration of allergy specialist referral or immunotherapy
• Review of inflammation and antioxidant support
• Additional gut or immune evaluation when indicated

The purpose of testing is not to eliminate every substance that produces a detectable antibody. Results should be matched with symptoms and exposure history to identify which findings are clinically important.

Before Your Allergy & Inflammation Blood Test

How the Allergy & Inflammation Blood Panel Works

1. Order the Panel

After purchase, your geographic location is used to select the appropriate Labcorp regional respiratory allergen profile.

2. Receive Your Labcorp Requisition

The requisition includes the regional environmental allergy profile, CBC with differential, and hs-CRP.

3. Have Your Blood Drawn

Visit an appropriate Labcorp patient service center for specimen collection.

4. Review Allergy and Inflammation Together

Results can identify specific environmental sensitization, total IgE, eosinophil activity and broader systemic inflammation.

5. Determine Whether More Focused Testing Is Needed

Depending on the pattern, further evaluation may include targeted food IgE, additional mold testing, ESR, gastrointestinal testing, oxidative-stress testing or other immune and inflammatory studies.

Frequently Asked Questions About the Allergy & Inflammation Blood Panel

Does the regional allergy panel include total IgE?

Yes. Labcorp's regional respiratory allergen profiles include total IgE together with allergen-specific IgE measurements, so a separate total IgE test generally does not need to be added.

Why is the allergy panel different depending on where I live?

Plants, pollens and environmental exposures vary across the United States. Labcorp uses regional respiratory profiles so the tested trees, grasses, weeds and other allergens better match common exposures in your geographic area.

Why is a CBC with differential included?

The CBC provides eosinophil measurements. Eosinophils may become elevated with environmental allergy, asthma, eczema, certain gastrointestinal immune disorders, parasites and other conditions and therefore provide useful additional context.

Does a normal total IgE rule out allergy?

No. A patient can have clinically important allergen-specific IgE despite a normal total IgE. Specific allergen results and clinical history are more informative when identifying individual triggers.

Does this panel test for mold?

Regional respiratory profiles generally include common environmental molds such as Alternaria, Aspergillus, Cladosporium and Penicillium. These results measure IgE allergic sensitization and do not prove toxic mold or mycotoxin exposure.

Does this panel test for food allergies?

Food IgE is not included routinely. Targeted food-specific IgE testing can be added when symptoms suggest an immediate or reproducible reaction to a particular food.

Why isn't ESR automatically included?

ESR is a nonspecific systemic inflammatory marker and is not particularly specific for allergy. It is more useful as an add-on when symptoms suggest broader inflammatory, autoimmune or infectious disease.

Can I take antihistamines before the blood test?

Blood-specific IgE testing is generally not affected in the same way as allergy skin testing by antihistamines, which is one practical advantage of a blood-based environmental allergy profile.