Pervasive benefits of time-restricted feeding. Chronic circadian rhythm disruption is a risk factor for metabolic diseases. Studies in animal models (flies, mice, rats) and emerging studies in humans show that time-restricted feeding protects metabolic tissues from metabolic disturbances. Time-restricted feeding may also benefit brain health and could delay the development of neurodegenerative diseases. Abbreviations: ETC, electron transport chain; ROS, reactive oxygen species; UCP, uncoupling protein.