What role does Folsäure play in allergy?

The role of folic acid (vitamin B9) in allergies is not scientifically clear-cut. Folic acid is crucial for DNA synthesis and methylation processes that also influence immune regulation. Some observational studies suggest that adequate folate status during pregnancy may reduce the risk of childhood allergies such as asthma or eczema – but other studies found no effect or even an increased risk with high supplementation doses. Genetic variants in the MTHFR gene (e.g., C677T), which impair folate metabolism, have also been linked to altered allergy risk, but the effects are small and inconsistent. Overall, the evidence level is 'mechanistic' to 'unclear': plausible biological mechanisms exist, but there is insufficient clinical confirmation for a targeted folic acid recommendation for allergy prevention. MyBody-X does not offer a specific folic acid test; an MTHFR gene test may provide clues about personal folate needs, but it does not replace medical advice for existing allergies.