{"entity":{"id":"da-tech-blood-biomarkers","kind":"technology","name":"Blood Alzheimer biomarkers","aka":[],"tldr":"Blood tests may help decide who needs a scan or spinal-fluid test. They are not a home diagnosis.","summary":"Plasma p-tau and amyloid assays are entering clinical pathways in some systems. Cut-offs, comorbidities, and kit differences still matter.","status":"emerging","asOf":"2026-09-21","links":[{"label":"NIA","url":"https://www.nia.nih.gov/health/alzheimers-and-dementia"}],"tags":["dementia-atlas"],"related":["da-idea-blood-first-triage"],"cancers":["alzheimers-disease","mild-cognitive-impairment"],"sections":["da-front-fluid-biomarkers"],"technologies":[],"targets":[],"drugs":[],"companies":[],"institutions":[],"pathways":[],"terms":[],"trials":[],"people":[],"bottlenecks":[],"keyPapers":[],"journals":[],"dependsOn":[],"notes":[],"principle":"Plasma assays estimate amyloid or phosphorylated tau species.","strengths":[],"limitations":[]},"route":"/technologies/da-tech-blood-biomarkers/","neighbours":{"idea":[{"id":"da-idea-blood-first-triage","kind":"idea","name":"Blood test before PET or lumbar puncture","route":"/ideas/da-idea-blood-first-triage/"}],"cancer":[{"id":"alzheimers-disease","kind":"cancer","name":"Alzheimer’s disease","route":"/diagnoses/alzheimers-disease/"},{"id":"mild-cognitive-impairment","kind":"cancer","name":"Mild cognitive impairment","route":"/diagnoses/mild-cognitive-impairment/"}],"section":[{"id":"da-front-fluid-biomarkers","kind":"section","name":"Fluid biomarkers","route":"/fronts/da-front-fluid-biomarkers/"}]}}