Where your DNA places you among other people, and the studies behind it.
Not tailored to your result, and not medical advice
Talk To a Clinician Before Cutting Gluten: Celiac disease is identified with blood antibody tests and, in most cases, a biopsy of the small intestine, and both depend on gluten still being in the diet. NIDDK states plainly that doctors do not recommend starting a gluten-free diet before diagnostic testing, because a gluten-free diet can affect test results. Antibody levels fall and the intestinal lining begins to heal once gluten is removed, so cutting it out first can turn a real case into a negative result. If symptoms have you thinking about dropping gluten, raising it with a clinician before you change your diet keeps that option open. NIDDK (NIH)
Understand the HLA Gene Requirement: Celiac disease runs through two immune-presentation gene variants, HLA-DQ2 and HLA-DQ8. More than 90% of people with the disease carry HLA-DQ2 and the rest carry HLA-DQ8, and those haplotypes account for roughly 35% of the genetic risk. They are also common: 30% to 40% of the general population carries one, and only about 3% of carriers ever develop celiac disease. Carrying them is close to a prerequisite for the condition, and their absence almost rules it out, but carrying them is a long way from having it. Frontiers in Nutrition (PMC)
Do Not Count On Prevention: Early observational work suggested a protective window, introducing gluten between 4 and 6 months of age while the infant was still breastfed. Randomised trials did not bear it out. In PreventCD, small amounts of gluten between 16 and 24 weeks did not reduce celiac disease by age 3 in high-risk infants, and in CELIPREV delaying gluten from 6 months to 12 months delayed onset without changing how many children had the disease by age 5. Observational data suggest the amount of gluten eaten in early childhood tracks with risk, with intake above 2 g a day roughly doubling it, but no trial has confirmed that reducing it prevents the disease. Frontiers in Immunology (PMC)
Take Trace Gluten Seriously: For people with diagnosed celiac disease the trigger is dose-dependent, and the doses that matter are very small. Fifty milligrams is a crumb, well under a bite of bread, which is why shared toasters, flour dust, fryer oil and unlabelled sauces matter more than they intuitively should. American Journal of Clinical Nutrition (PubMed)
Watch For Nutrient Gaps: A 2025 systematic review of 46 observational studies found that a gluten-free diet reverses much of the malabsorption of untreated celiac disease, with lower odds of low iron, ferritin, calcium and vitamin B12 than in untreated patients. Compared with people who do not have celiac disease, those on a gluten-free diet still had higher odds of vitamin D deficiency, while folate showed no clear difference between the groups. The authors rated the overall quality of that evidence as very low, so it is better read as a flag than a settled finding. Naturally gluten-free whole foods such as legumes, leafy greens, nuts, seeds, eggs and oily fish carry more of these nutrients than the refined starches most packaged gluten-free products are built on. Journal of Clinical Medicine (PMC)
How much of this is genetic?
Genetics explains 75% of why people differ in this trait. The rest is environment, daily habits and chance.
Heritability estimate: Nistico L, et al. Gut 2006
Background and further reading
Celiac disease is an autoimmune condition in which ingesting gluten - a protein found in wheat, barley, and rye - triggers an immune reaction that damages the lining of the small intestine. Over time this flattens the intestinal villi and impairs nutrient absorption, which can cause diarrhea, bloating, weight loss, fatigue, iron-deficiency anemia, and, in children, delayed growth. Many people have subtle or extra-intestinal symptoms, and some have none at all, so the condition often goes undiagnosed. It affects roughly 1% of people worldwide, though prevalence varies by region and ancestry [1].
Genetic Basis: Celiac disease is one of the most strongly HLA-associated common diseases. Nearly everyone who develops it carries the HLA-DQ2 haplotype (encoded by HLA-DQA1*05 and HLA-DQB1*02) or, less commonly, HLA-DQ8 (HLA-DQB1*03:02); these molecules present gluten-derived peptides to T cells and drive the autoimmune response [2]. Carrying DQ2 or DQ8 is necessary but not sufficient - about 30-40% of the general population carries these haplotypes, yet most never develop the disease. Genome-wide association studies have identified more than 40 additional non-HLA loci, many in genes governing T-cell and cytokine signaling such as IL2/IL21, SH2B3, and the chemokine-receptor cluster on chromosome 3, which together refine individual predisposition [3]. Twin studies estimate high heritability, with concordance in identical twins far exceeding that in fraternal twins [4].
Environmental Factors: Dietary gluten is the essential environmental trigger: celiac disease cannot develop or persist without gluten exposure, and strict lifelong removal of gluten allows the intestine to heal. Other factors under study include the timing and amount of gluten introduced in infancy, breastfeeding, gastrointestinal infections such as certain reovirus strains, and the composition of the gut microbiome. The disease is also more common in people with other autoimmune conditions, including type 1 diabetes and autoimmune thyroid disease, reflecting shared immune-genetic pathways [1].
The published research behind your score, and the variants it draws on.
5 published scores from 2 studies
The celiac score combines 5 polygenic scores drawn from 2 published studies.
Lebwohl B, Sanders DS, Green PHR Coeliac disease. The Lancet (2018)
These traits are influenced by some of the same genes and variants as this one
Content updated August 2026.
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