Myths vs facts: FUT2 and Allergie

FUT2 (fucosyltransferase 2) determines secretor status and influences gut microbiota composition. Some studies link certain FUT2 variants to increased allergy risk, such as asthma or atopic dermatitis. The proposed mechanism involves altered mucosal glycosylation and microbiome changes. However, evidence is mixed: GWAS and observational studies show associations, but effect sizes are small and not consistently replicated across populations. FUT2 is not a monogenic allergy marker; it is one of many risk factors. A standalone FUT2 test is insufficient for allergy prediction or dietary recommendations. MyBody-X does not offer a specific FUT2 allergy analysis. Clinical relevance remains unclear; environmental factors, diet, and microbiome play larger roles. Be cautious of marketing claims labeling FUT2 as an 'allergy gene'.