Myths vs facts: HLA-DQ2 and Blutzucker

HLA-DQ2 is a genetic marker strongly associated with celiac disease. A common myth is that HLA-DQ2 directly raises blood sugar or causes diabetes. In reality, HLA-DQ2 affects blood sugar only indirectly: untreated celiac disease can damage the gut lining, leading to malabsorption and erratic blood glucose levels. Additionally, there is a genetic overlap between celiac disease and type 1 diabetes, so HLA-DQ2 carriers have a higher risk for both autoimmune conditions. However, the presence of HLA-DQ2 alone is not a predictor of blood sugar issues. Evidence comes from association studies (GWAS) and clinical observations, not from randomized controlled trials. A DNA test alone is insufficient for dietary recommendations – blood sugar should be assessed via established methods (fasting glucose, HbA1c). Beware of exaggerated marketing claims that derive direct diet advice from an HLA-DQ2 result.