Myths vs facts: MTHFR and Stress

MTHFR (methylenetetrahydrofolate reductase) is an enzyme involved in converting folate into its active form, 5-methyltetrahydrofolate. Common variants (C677T, A1298C) can reduce enzyme activity and raise homocysteine levels. Myth: MTHFR variants directly cause stress or anxiety disorders. Fact: There is some evidence linking elevated homocysteine to mental health symptoms, but the evidence is moderate and not causal. Many people with MTHFR variants have no symptoms. Stress itself can affect methylation, complicating interpretation. A DNA test from MyBody-X can identify these variants, but clinical relevance for stress or mental health is limited. Results should not be used as a diagnosis or sole basis for supplementation (e.g., methylfolate). Medical evaluation for elevated homocysteine or psychological symptoms is necessary. Evidence is based on association studies, not randomized controlled trials.