Satiety

Deep dive

Satiety: complete reference

Satiety is the state of being satisfied or fullness after eating, distinct from satiation (the feeling that ends a meal). Satiety determines how long until the next meal — longer satiety means longer time between eating events. Satiety is regulated by a complex network of gut hormones (GLP-1, peptide YY, CCK, leptin), neural signaling (vagal afferents), and central nervous system processing (hypothalamic + brainstem appetite centers). GLP-1 receptor agonists enhance satiety through multiple mechanisms: delayed gastric emptying (food stays in stomach longer), direct CNS appetite suppression, and modulation of food reward signaling. Patients commonly describe enhanced satiety as "feeling full longer" or "not thinking about food between meals" — distinct from "not being hungry," though related. Satiety dysfunction is a core feature of obesity; restoring satiety signals is the primary therapeutic mechanism for GLP-1 weight management.

In practice

Before Wegovy, you might think about lunch 2 hours after breakfast. On Wegovy, that interval often extends to 4-5 hours — you simply don't need food as soon.

Clinical context

Enhanced satiety is the foundation of GLP-1 weight loss — patients eat less because they don't want more, not because they're restraining hunger.