GFAP and Alzheimer disease: Neurofilament light (NfL) and glial fibrillary acidic protein (GFAP) are proteins that have also been disclosed as imperative biomarker candidates in AD pathology (Benedet AL et al. 2021; Mantellatto G M et al. 2024; Pereira JB et al. 2021; Zhao Y et al. 2019).