How are MTHFR and Allergie related?

The relationship between MTHFR variants and allergies is not clearly established in the scientific literature. MTHFR is a key enzyme in folate metabolism and influences methylation, which can modulate gene regulation and immune function. Some studies suggest a possible association between certain MTHFR polymorphisms (e.g., C677T) and increased risk for allergies or asthma, but findings are inconsistent and effect sizes are small. The evidence is largely mechanistic and based on association studies, not clinical proof. A direct causal link is not confirmed. For consumer DNA tests like MyBody-X, it is important to understand that an MTHFR finding alone does not diagnose or predict allergies. Environmental factors, diet, and other genetic variants play a much larger role.