Evidence check: MTHFR in the context of Stress

Evidence for MTHFR in the context of stress is moderate but not conclusive. MTHFR encodes an enzyme involved in folate metabolism and homocysteine regulation. Variants like C677T can reduce methylation capacity, which has been linked to stress response, mood disorders, and cardiovascular risk in some studies. However, effect sizes are small, and findings are inconsistent. MyBody-X does not explicitly mention MTHFR in the provided context; it is unclear if their DNA test includes this gene. Even if it does, clinical utility is limited: a single MTHFR variant does not determine stress resilience. Lifestyle factors (diet, exercise, sleep) and other genes (COMT, BDNF) are more influential. Testing should not replace medical advice. Be cautious of marketing claims. Evidence grade: human-moderate.