Calorie intake

Calorie intake is a physiological process reflecting the total amount of energy consumed through food and beverages, which is fundamental to maintaining metabolic balance and cellular function [4, 10]. It is not a discrete molecular target or receptor but is regulated by a complex interplay of peripheral hormonal signals and central nervous system circuits, primarily located in the hypothalamus [5, 13]. Hormones such as leptin, ghrelin, and glucagon-like peptide-1 (GLP-1) provide feedback to the brain regarding energy stores and immediate satiety, which in turn influences eating behavior [13]. Dysregulation of calorie intake, particularly chronic overconsumption, is a key driver of obesity, type 2 diabetes, and metabolic syndrome, while caloric restriction has been shown to modulate aging pathways like AMPK and mTOR [3, 9, 15]. Pharmacological interventions aimed at managing body weight often focus on reducing calorie intake by targeting specific receptors, such as the GLP-1 receptor or melanocortin 4 receptor (MC4R) [13, 14]. These drugs, including agonists like semaglutide and setmelanotide, effectively mimic or enhance natural satiety signals to reduce food consumption and treat metabolic diseases [11, 14]. Thus, while calorie intake itself is a behavioral and physiological outcome, its management is central to the therapeutic strategy for a range of metabolic and age-related conditions [8, 11].

Other names

Energy intakeCaloric intakeDietary energy intakeFood intake

Reduction of calorie intake is achieved through several mechanisms including GLP-1 receptor agonism to enhance satiety [11, 13], melanocortin 4 receptor (MC4R) activation to suppress appetite [13, 14], inhibition of gastric and pancreatic lipases to reduce fat absorption [14], and modulation of central reward and hunger circuits [13].