What to watch with MTHFR and Blutzucker?

MTHFR variants (e.g., C677T) affect folate metabolism and can raise homocysteine levels. Elevated homocysteine has been linked in some studies to insulin resistance and impaired glucose regulation. However, the evidence is moderate: effects are small, highly dependent on folate status, and not causally established. A consumer DNA test alone cannot predict your actual blood sugar – fasting glucose, HbA1c, and lifestyle factors (diet, exercise, weight) are far more important. Don't fall for marketing hype: MTHFR is not a diabetes gene. Ensure adequate folate intake (e.g., leafy greens), but avoid high-dose folic acid without medical need. If homocysteine or blood sugar is elevated, get proper clinical workup.