Lab
ApoE Genotyping
A one-time genetic test that shapes Alzheimer's and cardiovascular risk interpretation for life.
What it does
A one-time genetic test that shapes Alzheimer's and cardiovascular risk interpretation for life. A 4 allele raises risk — it changes probabilities, not certainties.
ApoE genotype is read once from a saliva or blood sample — the result never changes.
What the evidence shows
Overall evidence strength: High certainty
Who it's for, who should skip
Anyone wanting to sharpen lifetime risk interpretation. A 4-carrier result is a risk modifier, not a diagnosis — many 4-carriers never develop disease.
Running it
Measuring it
Retest ApoE Genotype — one-time; never retested.
Access & cost
Ordered as a lab test through the bloodwork lane.
Last reviewed 27 August 2026.