Gastrointestinal
Health

Food-Related Connection

Mapping delayed food-antibody reactivity
that may help contextualize complex
gastrointestinal presentations.

Gastrointestinal symptoms are frequently multifactorial, and patients may continue consuming foods that contribute to their symptom burden without recognizing a diet connection, since IgG-mediated reactions can be delayed by hours or days after ingestion[1,2].

The IgG Food MAP with Candida + Yeast is a dried blood spot (or serum) profile measuring total IgG antibody reactivity to specific foods, herbs, and spices, along with Candida albicans and Saccharomyces cerevisiae reactivity[1–7].

Explore the IgG Food MAP

When to Consider the IgG Food MAP

What the IgG Food MAP Measures

Clinical Applications & Evidence Context

How the IgG Food MAP Supports Clinical Reasoning

How to Order the IgG Food MAP

References

When Might Providers Consider the IgG Food MAP

Neurologic & Mental Health – Food-Related Connection1


GI Upset with Unclear Dietary Triggers:
Recurrent bloating, gas, or diarrhea where a specific food connection is not obvious to the patient due to delayed symptom onset.[1,2]


Suspected Non-Celiac Gluten/Wheat Sensitivity: 
GI or extra-intestinal symptoms associated with gluten ingestion in patients who have ruled out celiac disease via standard serology.[3,4]


Irritable Bowel Syndrome (IBS):
 IBS presentations, particularly where structural workup is unremarkable, that may benefit from a food-antibody-guided elimination approach.[1,2,7]


Inflammatory Bowel Disease (Crohn’s & Ulcerative Colitis):
Complex or relapsing presentations where dietary triggers may be an adjunctive consideration alongside conventional management.[6]


Candida & Fungal Overgrowth Concerns:
GI complaints alongside signs suggestive of Candida overgrowth (e.g., bloating, fatigue, oral thrush, skin/nail changes) where fungal-driven barrier disruption may be contributing to secondary food reactivity.[6] 


GI Symptoms with Overlapping Systemic Features: 
GI complaints co-occurring with headaches/migraines, skin rash or eczema, fatigue, or behavioral/mood changes, suggestive of broader food-antigen sensitivity.[2,5]

Analyte ClassWhat It ReflectsGI Relevance
Total IgG Food Antibodies (192 Analytes)IgG-mediated antibody reactivity to a broad panel of foods, herbs, and spices common to Western, Asian, and Mediterranean diets.May help identify delayed-onset dietary triggers relevant to chronic or recurrent GI symptom patterns not explained by IgE-mediated (immediate) food allergy testing[2,4].
Candida albicans IgG ReactivityAntibody response associated with Candida overgrowth in the GI tract.May provide context for fungal dysbiosis patterns that have been proposed to contribute to increased intestinal permeability and secondary food-antigen reactivity[6].
Saccharomyces cerevisiae (Yeast) IgG ReactivityAntibody response associated with yeast exposure and overgrowth patterns.May offer additional context for microbial/fungal contributors to GI symptom burden alongside Candida markers[6].
Gluten-Related Analytes (Gliadin, Wheat Gluten, Whole Wheat)IgG antibody reactivity to gluten-containing proteins, distinct from celiac-specific serology.May help contextualize non-celiac gluten/wheat sensitivity presentations in patients who do not meet celiac diagnostic criteria[3,4].
Dairy, Egg & Common Allergenic Food GroupsIgG reactivity to frequently consumed proteins (e.g., casein, whey, egg white, egg yolk) implicated in delayed food-reactivity patterns.May support elimination/rotation diet planning in patients with chronic bloating, altered bowel habits, or overlapping systemic complaints[1,2].

ConditionClinical Encapsulation
Irritable Bowel Syndrome (IBS)IBS has been associated with alterations in gut microbiota composition and increased intestinal permeability in a substantial proportion of patients; randomized controlled data indicate that IgG-guided food elimination diets may reduce symptom scores in IBS populations[1,2,7].
Non-Celiac Gluten/Wheat SensitivityPatients with gluten-related GI symptoms who do not meet celiac serologic or histologic criteria have been shown to carry a distinct IgG subclass response to gluten, and anti-gliadin IgG has been observed to decline with adherence to a gluten-free diet—supporting IgG’s use as a dietary-adherence and symptom-context marker in this population[3,4].
Candida & Fungal GI DysbiosisCandida overgrowth in the GI tract has been proposed to contribute to increased intestinal permeability, which may in turn allow larger food antigens to cross the mucosal barrier and drive secondary IgG-mediated food reactivity; IgG Food MAP’s Candida and yeast markers may help contextualize this overlap[6].
Inflammatory Bowel Disease (Crohn’s Disease & Ulcerative Colitis)IBD has been associated with increased intestinal permeability implicated in barrier maintenance and disease activity; dietary elimination approaches informed by IgG reactivity have been explored as adjunctive strategies for symptom and stool-frequency management in this population[6].
Migraine & Recurrent HeadacheRandomized, cross-over trial data have shown a reduction in headache days and migraine attack frequency following an IgG-guided elimination diet, suggesting IgG food reactivity patterns may be relevant to a subset of migraine presentations[5].
Celiac Disease & Malabsorption SyndromesMalabsorptive conditions involve impaired nutrient and protein processing; IgG gluten-related markers may provide additional dietary context alongside celiac-specific serology and structural workup in these patients[3,4].
Eczema, Skin Rash & Other Systemic Sensitivity PatternsGI complaints that co-occur with skin, behavioral, or systemic symptoms have been associated with food-antigen sensitivity patterns; IgG Food MAP may help identify candidate dietary triggers for elimination/rotation planning in these overlapping presentations[2].

Structures Dietary Hypothesis-Testing

Results can guide a supervised elimination and reintroduction diet protocol when a food-symptom relationship is suspected but unclear, offering a more organized approach that trial-and-error exclusion[1,2].

Contextualizes Multisystem Symptom Patterns

In patients with overlapping GI and concurrent systemic symptoms – including neurological, skin, and mood complains—IgG reactivity data may help contextualize the broader clinical picture and inform integrative dietary and lifestyle interventions[,2,5].

Supports Patient Engagement & Adherence

Providing patients with individualized food-reactivity data can increase motivation to adhere to dietary modification and elimination protocols when symptom attribution may have been ambiguous previously.

How to Order

Neurologic & Mental Health – Food-Related Connection1

To order the IgG Food MAP with Candida + Yeast, register for a portal account. Specimen collection kits and requisition forms are available through your account portal. For clinical support or interpretation questions, contact our clinical education team.

Order the IgG Food MAP

Explore Other Gastrointestinal Health Lenses:

Exposure-Oriented
Connection
Metabolic
Connection
Gut-Brain
Connection
Food-Related
Connection
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This webpage is intended for licensed healthcare professionals and is for informational and educational purposes only. The test results are not intended to diagnose, treat, cure, or prevent disease. All clinical interpretation should be done by a qualified healthcare professional in the context of the individual patient. Statements regarding associations between health symptoms and conditions do not constitute diagnostic claims.

References

  1. Atkinson W, Sheldon TA, Shaath N, Whorwell PJ. Food elimination based on IgG antibodies in irritable bowel syndrome: a randomised controlled trial. Gut. 2004;53(10):1459-1464. doi:10.1136/gut.2003.037697.
  2. Drisko J, Bischoff B, Hall M, McCallum R. Treating irritable bowel syndrome with a food elimination diet followed by food challenge and probiotics. J Am Coll Nutr. 2006;25(6):514-522. doi:10.1080/07315724.2006.10719567
  3. Maimaris S, Scarcella C, Memoli GA, Crisciotti C, Schiepatti A, Biagi F. Non-Coeliac Wheat Sensitivity: Symptoms in Search of a Mechanism, or a Distinct Well-Defined Clinical Entity? A Narrative Review. Int J Mol Sci. 2025;26(22):11174. Published 2025 Nov 19. doi:10.3390/ijms262211174
  4. Uhde M, Caio G, De Giorgio R, Green PH, Volta U, Alaedini A. Subclass Profile of IgG Antibody Response to Gluten Differentiates Nonceliac Gluten Sensitivity From Celiac Disease. Gastroenterology. 2020;159(5):1965-1967.e2. doi:10.1053/j.gastro.2020.07.032
  5. Alpay K, Ertas M, Orhan EK, Ustay DK, Lieners C, Baykan B. Diet restriction in migraine, based on IgG against foods: a clinical double-blind, randomised, cross-over trial. Cephalalgia. 2010;30(7):829-837. doi:10.1177/0333102410361404
  6. Michielan A, D’Incà R. Intestinal Permeability in Inflammatory Bowel Disease: Pathogenesis, Clinical Evaluation, and Therapy of Leaky Gut. Mediators Inflamm. 2015;2015:628157. doi:10.1155/2015/628157
  7. Napolitano M, Fasulo E, Ungaro F, et al. Gut Dysbiosis in Irritable Bowel Syndrome: A Narrative Review on Correlation with Disease Subtypes and Novel Therapeutic Implications. Microorganisms. 2023;11(10):2369. Published 2023 Sep 22. doi:10.3390/microorganisms11102369


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