What role does HLA-DQ2 play in blood sugar?

HLA-DQ2 is a genetic risk marker for celiac disease, not a direct regulator of blood sugar. In untreated celiac disease, intestinal damage can cause malabsorption and blood sugar fluctuations (e.g., reactive hypoglycemia). However, a direct causal effect of HLA-DQ2 on glucose metabolism is not established. The link is indirect: through gluten intolerance and inflammation. Without celiac disease, HLA-DQ2 has no proven role in fasting glucose or insulin sensitivity. Evidence is based on clinical practice, not randomized trials. A genetic test for HLA-DQ2 alone does not predict diabetes risk. For blood sugar concerns, validated markers like HbA1c, fasting glucose, or oral glucose tolerance test should be prioritized.