Satiety
Definition
The feeling of fullness after eating that holds off further eating. Hormone signals from the gut, fat tissue and brain control it.
Satiety
Satiety is the feeling of being full and satisfied after eating, which keeps you from wanting more food until the next meal. It differs from satiation, which is the process of becoming full during a meal. Satiety depends on a network of hormone, nerve and mechanical signals. Gut hormones such as GLP-1, peptide YY and cholecystokinin are released when you eat and act on receptors in the brainstem and hypothalamus to curb appetite. When the stomach stretches, vagus nerve fibers send fullness signals to the brain. Together these pathways decide how long you stay satisfied between meals.
Weak satiety signaling is a key part of how obesity develops. In people with obesity, the hormone and nerve systems that normally control eating may not work properly, so they respond less to fullness signals and eat more. This can involve releasing less of the fullness hormones after meals, a weaker brain response to them, or both. Restoring satiety signals is therefore a major treatment strategy in obesity.
Retatrutide boosts satiety in several ways built into its triple agonist design. Its GLP-1 receptor activity acts on appetite centers in the brain to promote fullness and slows gastric emptying, so the stomach stays stretched longer after meals. Its GIP receptor activity may add to appetite control in the brain. Together these effects cut calorie intake substantially, which is the main driver of the large weight loss seen in clinical trials. People in retatrutide studies have reported clearly less hunger and fewer food cravings, as you would expect from stronger satiety signals.