MAPT and tauopathy: Increased free iron availability initiates and maintains Tau phosphorylation, a process implicated in the abnormal modification of Tau protein, and is associated with neurofibrillary tangles, characteristic of tauopathies, a group of neurodegenerative disorders (J Bonda et al. 2011; Reichert et al. 2020; Serrano‐Pozo et al. 2011).