Can FUT2 help with Blutzucker?

The question whether FUT2 (fucosyltransferase 2) directly affects blood sugar is not clearly supported by evidence. FUT2 is primarily known for its role in H antigen synthesis on mucosal surfaces and secretor status, which influences gut microbiome composition and vitamin B12 absorption. Some GWAS have found weak associations between FUT2 variants and type 1 diabetes or metabolic traits, but effect sizes are small and findings inconsistent. Blood sugar regulation is predominantly driven by diet, physical activity, insulin sensitivity, and lifestyle factors. A DNA test for FUT2 alone cannot provide reliable information about blood sugar control or diabetes risk. The evidence level is 'gwas', with the caveat that clinical relevance is unclear and no personalized dietary or therapeutic recommendations can be derived. For a proper assessment of blood sugar, established biomarkers such as fasting glucose, HbA1c, and insulin, along with medical consultation, are essential.