The full answer
No — but it can help rule celiac disease out
Genetic testing for the HLA-DQ2 and HLA-DQ8 gene variants can’t confirm celiac disease on its own, since roughly a third of the general population carries one of these genes without ever developing the condition. What it’s genuinely useful for is ruling celiac disease out — a negative result makes celiac disease highly unlikely.
When it's typically used
Genetic testing is most often used when results from blood tests or a biopsy are unclear, or to help decide whether at-risk family members need ongoing monitoring.
Important context
Individual symptoms, reactions, medical histories, food products, and local labeling rules can vary. Community experiences are not medical evidence.
For personal medical decisions, diagnosis, testing, or treatment, consult a qualified healthcare professional.