Risks and limits of APOE Labor

APOE genetic testing (lab) is often offered by direct-to-consumer services like MyBody-X, but it carries significant risks and limitations. The APOE ε4 allele is the strongest known genetic risk factor for late-onset Alzheimer's disease, yet it is not diagnostic. A positive result does not guarantee disease – many ε4 carriers never develop Alzheimer's, and many patients lack ε4. Thus, predictive value for individuals is low. Psychosocial risks include anxiety, stigma, and altered life decisions. Without genetic counseling, results can be misinterpreted. Moreover, most home tests are not certified for medical diagnosis; they provide only risk estimation. Evidence for clinical utility in healthy individuals is limited (evidence grade: human-moderate). Recommendation: Seek genetic counseling before testing and discuss results with a physician.