What a test can show
Genotyping is possible, but purpose, counselling and consequences of knowing should come first.
Research zone
APOEAlzheimer risk and longevity
APOE alleles modify relative risk and age at onset but do not determine a person’s fate.
RELATIONSHIP VALIDITYRobust association, complex clinical utility
ACTIONABILITYLimited for asymptomatic consumer testing
SOURCE CHECKLinks and claim boundaries are editorially checked; external expert review is stated only with named disclosure
Practical meaning
Probability is neither a diagnosis nor a personal age-of-onset forecast.
Where knowledge ends
Risk depends on age, ancestry, family and vascular context; testing minors without indication is unethical.
SOURCES AND VERSION
Verifiable, not ‘trust us’.
Updated: 14 August 2026. Any clinical interpretation requires the exact variant, testing method, family information and medical context.