Evidence check: MTHFR in the context of Haut

The claim that MTHFR variants directly affect skin health is weakly supported by evidence. MTHFR is a key enzyme in folate and homocysteine metabolism. Certain polymorphisms (e.g., C677T) can reduce enzyme activity and raise homocysteine levels. Elevated homocysteine is linked to oxidative stress and inflammation, which could theoretically promote skin aging or conditions like psoriasis. However, robust clinical studies proving a direct causal effect on skin are lacking. Most data come from association studies with small effect sizes. A DNA test like MyBody-X can identify such variants, but the interpretation for skin health remains speculative. The evidence is primarily mechanistic, not clinically validated. For specific skin concerns, consulting a dermatologist is more reliable than relying solely on genetic testing. Results should be considered orienting, not diagnostic.