How are FUT2 and stress related?

The relationship between FUT2 (fucosyltransferase 2) and stress is not well supported by current evidence. FUT2 determines secretor status and influences gut microbiome composition. Through the gut–brain axis, altered microbiota could theoretically affect stress regulation, but direct human studies are lacking. Most associations remain mechanistic or speculative. A DNA test for FUT2 variants (e.g., rs601338) does not provide clinically actionable information about stress. For stress reduction, evidence-based approaches such as exercise, sleep hygiene, and mindfulness are far more relevant than single gene variants.