Myths vs facts: APOE and longevity

APOE is a gene involved in fat metabolism. Variants ε2, ε3, and ε4 carry different risks. Myth: APOE ε4 determines your lifespan. Fact: ε4 increases risk for Alzheimer's and cardiovascular disease, but many ε4 carriers live long, healthy lives. Lifestyle factors like diet, exercise, and not smoking have a much larger impact. Myth: ε2 guarantees longevity. Fact: ε2 is associated with lower Alzheimer's risk but also with higher risk of some bleeding disorders. Longevity is polygenic and influenced by environment. Evidence for APOE ε4 and Alzheimer's is human-strong; for longevity it is moderate and complex. Consumer DNA tests provide risk estimates, not diagnoses. Do not make medical decisions based solely on such tests. Consult a healthcare professional for personalized advice.