Calorie restriction improves metabolism in animal experiments

Calorie restriction improved glucose and fatty acid metabolism, while fasting led to difficulty handling glucose and fat accumulation in the liver. Calorie restriction also strengthened daily biological rhythms and coordination among genes involved in metabolism. Fasting-refeeding cycles disrupted these patterns. Changes in digestion and metabolic measures suggested that food leaving the stomach served as a primary metabolic trigger during short-term fasting. The authors concluded that calorie restriction engaged metabolic regulation that operated in anticipation of nutrient cues and aligned with the body clock. Fasting-refeeding cycles instead relied on direct nutrient cues.