Risks and limits of MTHFR Männer

MTHFR testing for men is often marketed with claims about fertility, heart health, or detoxification. The scientific reality is more sobering: variants C677T and A1298C affect folate metabolism and can elevate homocysteine levels – a risk factor for cardiovascular disease. However, the predictive value for individual men is low, as homocysteine is also regulated by diet, lifestyle, and other genes. Most commercial tests overstate clinical relevance. For men with fertility concerns, some studies suggest an association between MTHFR variants and male infertility, but the evidence is moderate and insufficient for routine testing. Another risk is self-medication with high-dose folic acid, which can be harmful in certain variants (e.g., masking B12 deficiency). Limits include lack of clinical validation for many panels, overinterpretation of risk scores, and neglect of environmental factors. MTHFR tests are not a substitute for medical evaluation. Men should always discuss results with a doctor before taking supplements.