Myths vs facts: MTHFR and Blutzucker

The claim that MTHFR variants directly control blood sugar is a myth. MTHFR encodes an enzyme in folate metabolism and homocysteine regulation. Some observational studies link the MTHFR C677T polymorphism to increased type 2 diabetes risk, possibly via elevated homocysteine and oxidative stress. However, the evidence is heterogeneous and insufficient for clinical recommendations. Medical guidelines do not recommend MTHFR screening for blood sugar management. Fact: Adequate folate intake (400–800 µg folic acid/day) is important for everyone regardless of MTHFR status. To improve blood sugar, focus on proven strategies: high-fiber diet, physical activity, weight management. MTHFR tests that promise personalized blood sugar control are not evidence-based. Beware of marketing that suggests simple gene-diet solutions.