Blood-based biomarkers for Alzheimer's disease

Blood-based biomarkers for identifying Alzheimer's disease (AD) pathology have been of considerable interest over the past decade and can offer a significant advantage over the currently available and validated cerebrospinal fluid and positron emission tomography biomarkers in terms of cost, invasiveness and accessibility. This review explores the role of three blood-based biomarkers; plasma amyloid β, tau and neurofilament light chain, and their combination, in the identification of AD pathology and how they may be utilised in clinical practice.