Abstract
Neurodegenerative diseases are associated with the senescence of functional neurons, which hampers brain functions. These diseases are caused by the accumulation of reactive oxygen species, reactive nitrogen species, cholinesterase malfunction, neuronal inflammation, and mitochondrial dysfunction. The incidence of neurodegenerative disease has been on the rise. Current therapeutic interventions are expensive, exhibit poor efficacy, and have numerous side effects. Several studies have explored the potential of crucial dietary substances rich in antioxidants and micronutrients in alleviating the clinical manifestations of such deadly diseases. Consumption of sufficient antioxidants, fatty acids, and polyphenols in regular diets delays the onset of neurodegenerative diseases. Several medicinal plants, such as Withania somnifera, Curcuma longa, Panax ginseng, Ginkgo biloba, aloe vera, Punica granatum, and various phytoextracts, contain such micronutrients in reasonable amounts. Specific dietary interventions, supplements, and patterns such as the Mediterranean-DASH intervention for neurodegenerative delay, ketogenic, paleolithic, and Wahls elimination diets have been beneficial in neurodegenerative conditions. These diet interventions and other functional foods can be an attractive, non-invasive, and inexpensive approach in the management and prevention of neurodegenerative conditions. This review discusses potential pharmacological bases involved in neurodegeneration, covering mitochondrial damage, impaired mitophagy, neuroinflammation, ferroptosis, glymphatic clearance dysfunction, brain-body interactions, and disruption of vagus nerve stimulation. The review further highlights clinical diet interventions and assorted functional foods, including fruits, vegetables, vitamins, specific supplements, and special diets, for neurodegenerative conditions. The discussion extends insights into clinical research and trials of these functional foods under neurodegenerative conditions. Overall, dietary interventions show promise in the prevention and management of neurodegenerative conditions.