Critical changes in cellular and molecular processes that occur with ageing disturb the central nervous system's homeostatic equilibrium. Metal accumulation makes the brain more vulnerable to neurotoxic shocks through mechanisms such mitochondrial failure, calcium-ion dyshomeostasis in neurons, a buildup of damaged molecules, reduced DNA repair, decreased neurogenesis, and impaired energy metabolism. These characteristics have been shown to be the cause of neuronal damage that result in a variety of neurological diseases. According to several studies, the development of neurodegenerative disorders including Parkinson's disease, Alzheimer's disease, Huntington's disease, and amyotrophic lateral sclerosis is strongly correlated with metal buildup, aberrant protein expression, and protein synthesis. This review illustrates iron metal's accumulation and impacts on the development of neurological disorders in relation to the ageing brain.