APOE genotyping (especially ε4) is one of the most studied genetic risk factors for late-onset Alzheimer's disease. In seniors, a positive ε4 finding increases risk but is not diagnostic. MyBody-X offers this test as part of its DNA analysis. Important: having an ε4 allele does not mean you will develop the disease – many ε4 carriers remain healthy. The test provides a risk estimate, not a prediction, and must be interpreted in clinical context. Lifestyle factors (diet, exercise, cognitive engagement) play a major role. Additionally, knowing one's APOE status can cause psychological distress. Genetic counseling before and after testing is recommended. The evidence for the association is strong (human-strong), but the clinical utility for asymptomatic seniors is debated. MyBody-X notes these limitations in its reports.
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