Desire to eat

The "desire to eat" is a multifaceted physiological and psychological state, commonly referred to as appetite, that drives the pursuit and consumption of food to maintain energy homeostasis [4, 7]. It is not a single molecular target but rather a complex behavioral endpoint regulated by the interaction of homeostatic signals in the hypothalamus and hedonic/reward signals in the mesocorticolimbic dopamine system [10, 18]. Appetite is modulated by a variety of peripheral hormones, including orexigenic (appetite-stimulating) signals like ghrelin and anorexigenic (appetite-suppressing) signals such as glucagon-like peptide 1 (GLP-1), peptide YY (PYY), and leptin [12, 13, 15]. Dysregulation of the desire to eat is a primary driver of global metabolic health crises, specifically obesity and type 2 diabetes, where patients experience excessive hunger or reduced satiety [1, 5, 13]. Therapeutic intervention focuses on modulating the underlying molecular receptors—primarily G protein-coupled receptors like GLP-1R, GIPR, and MC4R—to pharmacologically suppress appetite and prospective food intake [1, 5, 8]. Recent advancements in multi-receptor agonists (e.g., tirzepatide and retatrutide) demonstrate that simultaneously targeting multiple metabolic pathways can significantly blunt the desire to eat and lead to substantial weight reduction [5, 13].

Other names

AppetiteHungerFood cravingHedonic hungerProspective food consumptionFood-seeking behavior

Agonism of Glucagon-like peptide 1 receptors (GLP-1R), Gastric inhibitory polypeptide receptors (GIPR), and Glucagon receptors (GCGR) to enhance satiety; agonism of Melanocortin 4 receptors (MC4R) to reduce intake; modulation of central reward pathways via opioid receptor antagonism and dopamine/norepinephrine reuptake inhibition to reduce food cravings.