Myths vs facts: Longevity DNA Test and Allergie

Myths vs facts: Longevity DNA Test and Allergies. Many direct-to-consumer tests claim that genetic variants like MTHFR C677T or IgE levels can predict lifespan. The evidence is weak. MTHFR rs1801133 is often linked to longevity, but the data is unclear – blood homocysteine should be tested before taking supplements. Total IgE (e.g., 250 IU/mL) is a clinical marker for allergies or parasites, not a longevity indicator. GWAS data for rs601338 show associations with blood protein levels, not allergies or lifespan. Bottom line: longevity DNA tests are not evidence-based; they mix marketing with real science. Consumers should be cautious and not change supplements based solely on such tests.