Neurofilament light chain (NfL) and glial fibrillary acidic protein (GFAP) are cytoskeletal proteins specific to the pathology of neurons and astrocytes, respectively, that correlate with brain tissue damage associated with various conditions, including inflammatory, degenerative, vascular, and traumatic brain injuries [14,15,16,17,18,19]. This evidence concerns the gene GFAP and brain injury.