Differential Gluten-Related Diagnoses
of Celiac Disease
Wheat allergy, celiac disease and non-celiac gluten sensitivity – what is the difference?
Stomach pain and digestive issues after consuming gluten-containing foods do not always point to celiac disease.1 Celiac disease shares characteristics with other gluten-related disorders, such as non-celiac gluten sensitivity (NCGS) and wheat allergy.1 The three conditions present with similar manifestations which can be challenging to differentiate, but they are distinct:1-3
- Wheat allergy is an IgE-mediated allergic reaction to wheat
- Celiac disease is an autoimmune response triggered by gluten ingestion
- NCGS is neither an allergic nor an autoimmune reaction to gluten, but patients experience symptoms after eating gluten
Non-celiac gluten sensitivity (NCGS)
NCGS is a non-autoimmune condition characterised by intestinal and extraintestinal symptoms related to gluten ingestion in people who do not have celiac disease or wheat allergy.2,4 It is the most common gluten-related disorder, with a prevalence of up to 13% in the general population.4
Symptoms
NCGS shares gastrointestinal manifestations with celiac disease and IBS but can also include:2,3
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Symptoms occur within hours to days after ingesting gluten and often improve within hours or a few days if no further gluten is eaten.2,3
Diagnosis
NCGS is diagnosed after:4
Management
As with celiac disease, the treatment for NCGS is a gluten-free diet.1
Wheat allergy
Wheat allergy involves an excessive immune response to allergens in wheat. It is an IgE-mediated reaction of the adaptive immune system and has gastrointestinal manifestations similar to celiac disease, but it does not cause permanent gastrointestinal damage.2,5 Wheat allergy is one of the five most common food allergies in children, with a prevalence of approximately 1% in the general population.5,6
Symptoms
Symptoms of wheat allergy develop within minutes to a few hours after eating foods that contain wheat. Some are similar to celiac disease (nausea, stomach cramps, diarrhea), but other symptoms include:2,3
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Management
The management of wheat allergy can range from avoiding consumption only in the presence of specific cofactors to complete avoidance of all wheat-containing products. Additionally, medical therapies are available to treat accidental reactions and allergen-specific immunotherapies are under development.7
Resources
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- Rej A, Aziz I, Sanders D S. Coeliac disease and noncoeliac wheat or gluten sensitivity. J Intern Med 2020;288:537-549
- Biesiekierski J R, Iven J. Non-coeliac gluten sensitivity: piecing the puzzle together. United European Gastroenterol J 2015;3:160-165
- Størdal K, Kurppa K. Celiac disease, non-celiac wheat sensitivity, wheat allergy - clinical and diagnostic aspects. Semin Immunol 2025;77:101930
- Akhondi H, Ross A B. Gluten-associated medical problems. StatPearls. StatPearls Publishing, Treasure Island, FL, US, last updated 31 October 2022. Available at: https://www.ncbi.nlm.nih.gov/books/NBK538505/
- Patel N, Samant H. Wheat allergy. StatPearls. StatPearls Publishing, Treasure Island, FL, US, last updated 25 June 2023. Available at: https://www.ncbi.nlm.nih.gov/books/NBK536992/
- Czaja-Bulsa G, Bulsa M. What do we know now about IgE-mediated wheat allergy in children? Nutrients 2017;9:35
- European Academy of Allergy and Clinical Immunology. Molecular Allergology User's Guide 2.0. Available at: https://eaaci-cdn-vod02-prod.azureedge.net/KnowledgeHub/education/books/MAUG_2_20221214_EBOOK.pdf. Accessed March 2025