The Alcat Test helps personalize nutrition and lifestyle strategies by assessing how immune cells respond to foods, additives, chemicals, medicinal herbs, molds, and other substances. By measuring changes in leukocyte activity after exposure, Alcat Test helps uncover cellular reactions not captured by standard allergy testing.
This makes Alcat a valuable tool for complex, chronic, or difficult-to-explain symptoms, especially when conventional workups are unrevealing or when symptoms appear to fluctuate with diet, environment, or immune activation.
Alcat evaluates immune cell response to foods, additives, chemicals, and other common exposures. This cellular approach offers a layer of insight beyond antibody-based testing, especially when chronic inflammation persists or standard evaluations don't fully explain the clinical picture.
Alcat Test complements GI assessment by adding a layer of insight on potential food or chemical exposures activating the immune system. Genova's GI Effects provides insight into digestive function, microbiome status, inflammation, and gut immune activity through markers such as secretory IgA, calprotectin, eosinophil protein X, and occult blood, while Alcat adds a practical way to evaluate potential dietary and environmental triggers that may be influencing inflammatory burden.
Alcat evaluates cellular immune response after exposing leukocytes, including neutrophils, lymphocytes, monocytes, eosinophils, and basophils, to potential triggers. Changes in white blood cell size, volume, and number are assessed as indicators of cellular reactivity.
This cellular approach is designed to capture immune cell activation patterns that occur in immunologic, toxic, pharmacologic, or inflammatory pathways. Clinical studies using Alcat Test results to guide dietary modification have reported significant improvements in a range of symptoms.1, 2, 7-9 The clinical utility of Alcat-guided dietary intervention has also been evaluated in double-blind and placebo-controlled study designs.10, 11
See Exactly What's TestedReview panels, combinations, and a list of everything that's tested with Alcat.
The Alcat Test may be helpful for individuals who suspect that foods, additives, chemicals, or other environmental exposures are contributing to persistent symptoms, but who are unsure where to begin. For many people, tracking diet and symptoms can feel overwhelming, especially when reactions are delayed, inconsistent, or difficult to connect to a specific exposure.
Food and chemical sensitivities can contribute to symptoms that span multiple body systems, including gastrointestinal, neurologic, dermatologic, musculoskeletal, respiratory, and metabolic concerns.
Alcat Test provides personalized, actionable information that can help guide a more targeted elimination and reintroduction plan. Rather than starting with a broad or highly restrictive elimination diet, clinicians can use Alcat results to help prioritize which foods or substances may be most relevant to the patient's symptom pattern.
Consider Alcat Test for individuals with persistent or recurring symptoms that appear to be influenced by food, chemical, or environmental exposures, including:
| Gastrointestinal Symptoms | bloating, abdominal discomfort, diarrhea, constipation, reflux, gastritis, IBS-like symptoms, suspected malabsorption |
|---|---|
| Neurologic and Energy Concerns | migraines, headaches, brain fog, memory changes, fatigue, mood changes, difficulty concentrating |
| Skin Symptoms | eczema, psoriasis, rashes, urticaria, acne, unexplained skin flares |
| Respiratory Symptoms | chronic cough, wheezing, sinus congestion, recurrent upper airway irritation |
| Musculoskeletal Concerns | aching joints, stiffness, tendon discomfort, inflammatory pain patterns |
| Metabolic and Hormonal Concerns | weight-loss resistance, metabolic syndrome, blood sugar dysregulation, thyroid-related symptoms, menstrual irregularity, infertility when clinically appropriate |
| Immune and Inflammatory Presentations | allergies, autoimmune patterns, recurrent infections, complex multisystem symptoms requiring a broader functional assessment |
The Alcat Test evaluates immune cell reactivity by measuring how white blood cells respond when exposed to individual foods, additives, chemicals, medicinal herbs, molds, or other test substances. Using a whole-blood sample, the test challenges leukocytes ex vivo (outside the body) and measures changes in cell size, volume, and number that may occur during cellular activation.
This cellular approach is designed to assess innate immune activity, particularly the response of granulocytes such as neutrophils, which make up the majority of circulating white blood cells and play a central role in the body's first-line inflammatory defense. Acute neutrophil activation is essential for protecting the body from infection and injury. However, when immune activation becomes persistent or poorly regulated, inflammatory signaling may contribute to ongoing symptoms and physiologic stress.
By focusing on leukocyte activation rather than a single antibody class, the Alcat Test offers a different lens for evaluating potential dietary and environmental triggers.
Unlike classic IgE allergy testing, the Alcat Test is not designed to diagnose immediate, IgE-mediated food allergy or anaphylaxis risk. Instead, it is intended to help identify potential non-IgE cellular reactions that may be relevant in patients with delayed, complex, or difficult-to-trace symptom patterns. Results should always be interpreted in the context of the individual's history, symptoms, diet, medications, and other laboratory findings.
The Alcat Test also differs from IgG food antibody testing. IgG testing measures antibody response to food antigens, while Alcat Test evaluates cellular response. This distinction matters because food and chemical sensitivities may involve multiple pathways, including immunologic, toxic, pharmacologic, and inflammatory mechanisms. A cellular response may occur without direct antibody involvement, as activated immune cells can release inflammatory mediators, reactive oxygen species, and other signaling molecules.
Alcat offers flexible panel options, from comprehensive food and chemical sensitivity assessment to focused food-only testing. Platinum Plus and 250 Food Panel are the two most commonly selected options. Additional panels and combinations are available for specialized testing strategies.
370 Items
The most popular Alcat option, designed for a comprehensive look at potential food, additive, mold, herb, medication, and chemical sensitivities.
250 Items
A focused option for a broad dietary starting point without testing additives, molds, herbs, or medication-related agents.
200 Food Panel + 50 Medicinal Herbs, Functional Foods, and Adaptogens + 30 Food Additives, Colorings, and Preservatives + 20 Antibiotics and Anti-inflammatory Agents
50 Food Panel + 30 Food Additives, Colorings, and Preservatives + Candida albicans
200 Food Panel + 30 Food Additives, Colorings, and Preservatives + 20 Molds
200 Food Panel + 30 Food Additives, Colorings, and Preservatives
150 Food Panel + 30 Food Additives, Colorings, and Preservatives + 20 Molds
Alcat testing is simple to prepare for. Patients do not need to fast, but they should be well hydrated before the blood draw.
Fasting is not required. Patients should drink water before the blood draw to support an easier collection.
Daily medications and supplements are generally continued and do not require delaying the test. When possible, avoid oral medications and supplements, IV infusions, and IM injections for 4 hours before collection.
For short-term medications, such as antibiotics, that will soon be discontinued, wait at least 2 weeks after finishing the medication before testing.
When appropriate and safe, patients may eat avoided foods they suspect are problematic 2 to 3 times during the week before testing. Do not reintroduce foods that have caused a true allergic reaction.
Blood should be collected in the provided blue-top vials, filled to capacity, and kept at room temperature. Samples should not be frozen, spun, or refrigerated. When possible, samples should be shipped the same day as the blood draw. Whole blood testing is validated up to 72 hours after collection, but immediate shipping is preferred.
The Alcat Test helps personalize nutrition and lifestyle strategies by assessing how immune cells respond to foods, additives, chemicals, medicinal herbs, molds, and other substances. By measuring changes in leukocyte activity after exposure, Alcat Test helps uncover cellular reactions not captured by standard allergy testing.
This makes Alcat a valuable tool for complex, chronic, or difficult-to-explain symptoms, especially when conventional workups are unrevealing or when symptoms appear to fluctuate with diet, environment, or immune activation.
Alcat evaluates immune cell response to foods, additives, chemicals, and other common exposures. This cellular approach offers a layer of insight beyond antibody-based testing, especially when chronic inflammation persists or standard evaluations don't fully explain the clinical picture.
Alcat Test complements GI assessment by adding a layer of insight on potential food or chemical exposures activating the immune system. Genova's GI Effects provides insight into digestive function, microbiome status, inflammation, and gut immune activity through markers such as secretory IgA, calprotectin, eosinophil protein X, and occult blood, while Alcat adds a practical way to evaluate potential dietary and environmental triggers that may be influencing inflammatory burden.
Alcat evaluates cellular immune response after exposing leukocytes, including neutrophils, lymphocytes, monocytes, eosinophils, and basophils, to potential triggers. Changes in white blood cell size, volume, and number are assessed as indicators of cellular reactivity.
This cellular approach is designed to capture immune cell activation patterns that occur in immunologic, toxic, pharmacologic, or inflammatory pathways. Clinical studies using Alcat Test results to guide dietary modification have reported significant improvements in a range of symptoms.1, 2, 7-9 The clinical utility of Alcat-guided dietary intervention has also been evaluated in double-blind and placebo-controlled study designs.10, 11
See Exactly What's TestedReview panels, combinations, and a list of everything that's tested with Alcat.
Explore the clinical science behind Alcat Testing, including Yale research showing that leukocyte activation test-positive foods can trigger measurable innate immune activity. This article explains how cellular food sensitivity testing may help clinicians move beyond guesswork and build more personalized elimination and reintroduction plans.
The Alcat Test may be helpful for individuals who suspect that foods, additives, chemicals, or other environmental exposures are contributing to persistent symptoms, but who are unsure where to begin. For many people, tracking diet and symptoms can feel overwhelming, especially when reactions are delayed, inconsistent, or difficult to connect to a specific exposure.
Food and chemical sensitivities can contribute to symptoms that span multiple body systems, including gastrointestinal, neurologic, dermatologic, musculoskeletal, respiratory, and metabolic concerns.
Alcat Test provides personalized, actionable information that can help guide a more targeted elimination and reintroduction plan. Rather than starting with a broad or highly restrictive elimination diet, clinicians can use Alcat results to help prioritize which foods or substances may be most relevant to the patient's symptom pattern.
Consider Alcat Test for individuals with persistent or recurring symptoms that appear to be influenced by food, chemical, or environmental exposures, including:
| Gastrointestinal Symptoms | bloating, abdominal discomfort, diarrhea, constipation, reflux, gastritis, IBS-like symptoms, suspected malabsorption |
|---|---|
| Neurologic and Energy Concerns | migraines, headaches, brain fog, memory changes, fatigue, mood changes, difficulty concentrating |
| Skin Symptoms | eczema, psoriasis, rashes, urticaria, acne, unexplained skin flares |
| Respiratory Symptoms | chronic cough, wheezing, sinus congestion, recurrent upper airway irritation |
| Musculoskeletal Concerns | aching joints, stiffness, tendon discomfort, inflammatory pain patterns |
| Metabolic and Hormonal Concerns | weight-loss resistance, metabolic syndrome, blood sugar dysregulation, thyroid-related symptoms, menstrual irregularity, infertility when clinically appropriate |
| Immune and Inflammatory Presentations | allergies, autoimmune patterns, recurrent infections, complex multisystem symptoms requiring a broader functional assessment |
Learn how to interpret Alcat Test results, understand food sensitivities versus allergies and intolerances, and use elimination, rotation, and reintroduction strategies to create a personalized nutrition plan.
The Alcat Test evaluates immune cell reactivity by measuring how white blood cells respond when exposed to individual foods, additives, chemicals, medicinal herbs, molds, or other test substances. Using a whole-blood sample, the test challenges leukocytes ex vivo (outside the body) and measures changes in cell size, volume, and number that may occur during cellular activation.
This cellular approach is designed to assess innate immune activity, particularly the response of granulocytes such as neutrophils, which make up the majority of circulating white blood cells and play a central role in the body's first-line inflammatory defense. Acute neutrophil activation is essential for protecting the body from infection and injury. However, when immune activation becomes persistent or poorly regulated, inflammatory signaling may contribute to ongoing symptoms and physiologic stress.
By focusing on leukocyte activation rather than a single antibody class, the Alcat Test offers a different lens for evaluating potential dietary and environmental triggers.
Unlike classic IgE allergy testing, the Alcat Test is not designed to diagnose immediate, IgE-mediated food allergy or anaphylaxis risk. Instead, it is intended to help identify potential non-IgE cellular reactions that may be relevant in patients with delayed, complex, or difficult-to-trace symptom patterns. Results should always be interpreted in the context of the individual's history, symptoms, diet, medications, and other laboratory findings.
The Alcat Test also differs from IgG food antibody testing. IgG testing measures antibody response to food antigens, while Alcat Test evaluates cellular response. This distinction matters because food and chemical sensitivities may involve multiple pathways, including immunologic, toxic, pharmacologic, and inflammatory mechanisms. A cellular response may occur without direct antibody involvement, as activated immune cells can release inflammatory mediators, reactive oxygen species, and other signaling molecules.
Alcat offers flexible panel options, from comprehensive food and chemical sensitivity assessment to focused food-only testing. Platinum Plus and 250 Food Panel are the two most commonly selected options. Additional panels and combinations are available for specialized testing strategies.
370 Items
The most popular Alcat option, designed for a comprehensive look at potential food, additive, mold, herb, medication, and chemical sensitivities.
250 Items
A focused option for a broad dietary starting point without testing additives, molds, herbs, or medication-related agents.
200 Food Panel + 50 Medicinal Herbs, Functional Foods, and Adaptogens + 30 Food Additives, Colorings, and Preservatives + 20 Antibiotics and Anti-inflammatory Agents
50 Food Panel + 30 Food Additives, Colorings, and Preservatives + Candida albicans
200 Food Panel + 30 Food Additives, Colorings, and Preservatives + 20 Molds
200 Food Panel + 30 Food Additives, Colorings, and Preservatives
150 Food Panel + 30 Food Additives, Colorings, and Preservatives + 20 Molds
Alcat testing is simple to prepare for. Patients do not need to fast, but they should be well hydrated before the blood draw.
Fasting is not required. Patients should drink water before the blood draw to support an easier collection.
Daily medications and supplements are generally continued and do not require delaying the test. When possible, avoid oral medications and supplements, IV infusions, and IM injections for 4 hours before collection.
For short-term medications, such as antibiotics, that will soon be discontinued, wait at least 2 weeks after finishing the medication before testing.
When appropriate and safe, patients may eat avoided foods they suspect are problematic 2 to 3 times during the week before testing. Do not reintroduce foods that have caused a true allergic reaction.
Blood should be collected in the provided blue-top vials, filled to capacity, and kept at room temperature. Samples should not be frozen, spun, or refrigerated. When possible, samples should be shipped the same day as the blood draw. Whole blood testing is validated up to 72 hours after collection, but immediate shipping is preferred.