1019 IgG Food Antibodies - Bloodspot
Performed by: Genova Diagnostics
What is the 1019 IgG Food Antibodies – Bloodspot test?
The 1019 IgG Food Antibodies – Bloodspot panel by Genova Diagnostics is a dried blood spot test designed to measure IgG antibody responses to a wide range of commonly consumed foods. It helps identify delayed immune reactions to foods, sometimes referred to as IgG-mediated food sensitivities.
Unlike immediate food allergies (IgE-mediated), which can trigger rapid symptoms like hives or anaphylaxis, IgG food reactions may develop hours to days after eating. This delay can make it difficult to connect symptoms to specific foods without testing.
The bloodspot collection method allows for convenient at-home sampling using a finger-prick blood sample.
What does this panel measure?
This panel evaluates IgG antibodies to dozens of foods across key categories, which may include:
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Dairy products
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Grains and gluten-containing foods
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Eggs
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Nuts and seeds
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Fish and shellfish
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Fruits and vegetables
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Legumes and soy
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Common additives or yeast
Elevated IgG levels to specific foods may indicate increased immune exposure or reactivity to those foods.
Why is this test ordered?
Clinicians may recommend the 1019 IgG Food Antibodies panel when patients experience chronic or unexplained symptoms that could be related to food sensitivities, such as:
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Bloating, gas, or digestive discomfort
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Headaches or migraines
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Skin issues (eczema, acne, rashes)
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Fatigue or brain fog
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Joint pain
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Sinus congestion
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IBS-like symptoms
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Inflammatory conditions
This test is often used as part of a broader functional or integrative medicine evaluation.
How to interpret results
Elevated IgG antibodies
Higher IgG levels to certain foods may suggest frequent exposure or sensitivity. Some practitioners use these results to guide temporary elimination diets followed by structured reintroduction.
Low or normal IgG antibodies
Low levels typically suggest less immune reactivity to those foods.
It is important to note that IgG antibodies can also reflect tolerance and regular exposure, not necessarily pathology. Results should always be interpreted alongside:
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Symptoms
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Diet history
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Clinical context
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Other lab markers (gut health, inflammation, etc.)
How results are used clinically
Results from the 1019 IgG Food Antibodies – Bloodspot panel are commonly used to:
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Personalize elimination diets
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Reduce inflammatory food triggers
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Support gut health protocols
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Guide reintroduction planning
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Monitor response over time
Many practitioners pair this test with stool testing, microbiome analysis, or inflammation markers for a more complete picture.
Bloodspot collection: what to expect
The dried blood spot method involves:
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Finger-prick blood collection at home
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Drops placed on a collection card
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Card mailed to the lab for analysis
This approach is convenient and requires no in-office blood draw.
Limitations to understand
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IgG testing does not diagnose food allergies
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Results do not replace clinical evaluation
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Not all elevated IgG results indicate a problem
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Best used as a guide, not a definitive diagnosis
A qualified practitioner should interpret results within the broader clinical picture.
Who might benefit from this test?
This panel may be useful for individuals with:
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Chronic digestive symptoms
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Suspected food sensitivities
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Autoimmune or inflammatory conditions
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Skin issues linked to diet
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Migraines or fatigue of unclear origin
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Ongoing symptoms despite dietary changes
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Biomarkers included in this panel:
Alfalfa
Asparagus
Casein
Celery
Chicken
The Chicken marker measures IgG antibodies to chicken proteins. Results are typically reported as none detected, very low, low, moderate, or high. These levels reflect immune exposure and recognition rather than a true food allergy. Interpreting the
Learn moreChocolate
The Chocolate marker measures IgG antibodies to cocoa or chocolate-containing foods. Results are reported as none detected, very low, low, moderate, or high. These levels reflect immune exposure and recognition rather than a true allergy. Interpretin
Learn moreClam
Cucumber
Egg Yolk
Garlic
Grapefruit
Lamb
The Lamb marker measures IgG antibodies to lamb proteins. Results are reported across ranges such as none detected, very low, low, moderate, or high. These categories reflect immune exposure and recognition rather than a true food allergy. Interpreti
Learn moreLettuce
Onion
Orange
Plum
Shrimp
Yeast
The Yeast marker measures IgG antibodies to baker’s or brewer’s yeast. Results are typically reported as none detected, very low, low, moderate, or high. These levels reflect immune exposure and recognition rather than a true yeast allerg
Learn more