Can MTHFR help with longevity?

Whether MTHFR can help with longevity is not scientifically clear-cut. MTHFR (methylenetetrahydrofolate reductase) is a key enzyme in folate and homocysteine metabolism. Certain variants, especially C677T (rs1801133), are linked to elevated homocysteine levels, which are associated with cardiovascular risk. Some observational studies suggest a connection between MTHFR polymorphisms and mortality, but effect sizes are small and heavily dependent on environmental factors like diet, vitamin status, and lifestyle. The evidence is mostly mechanistic and based on association studies, not randomized controlled trials. A direct causal effect on lifespan is not established. Moreover, longevity is polygenic, influenced by many genes each with tiny effects. A single gene test like MTHFR does not provide a personalized strategy for extending life. Instead, balanced nutrition, exercise, and risk factor avoidance are proven to be more impactful. In summary, MTHFR may be a small piece in the complex puzzle of longevity, but claiming it 'helps' alone is misleading and overstates the genetic contribution.