Evidence check: FUT2 in the context of Allergie

The FUT2 genotype determines secretor status and influences gut microbiome composition. Some studies suggest a link between non-secretor status (e.g., rs601338) and increased risk of atopic diseases like allergies, particularly in children. However, the evidence is inconsistent and mostly based on observational studies with small effect sizes. The clinical relevance for individuals remains unclear. Direct-to-consumer DNA tests like MyBody-X may analyze this variant, but results should not be used alone for prevention or treatment decisions. Allergies are multifactorial; environment, diet, and other genetic factors play larger roles. A physician or allergist can provide comprehensive risk assessment.