Evidence check: HLA-DQ2 in the context of Sport

The provided context contains no information about HLA-DQ2 in sport. HLA-DQ2 is strongly associated with celiac disease, but there is no robust scientific evidence linking it directly to athletic performance. Some direct-to-consumer genetic tests may claim such connections, but these are not supported by controlled studies. The evidence level is therefore unclear. Athletes should not base training or nutrition decisions on HLA-DQ2 results alone. However, a positive result may indicate increased risk for celiac disease, warranting medical follow-up if gastrointestinal symptoms are present. Without symptoms, a gluten-free diet is not recommended.