Gastric Emptying Modulation GLP2 transiently delays gastric emptying, similar to selective GLP-1 receptor agonists: Slowed rate of nutrient absorption from the gastrointestinal tract Reduced postprandial glucose excursions Effect is most pronounced after initial doses and diminishes with continued treatment Contributes to improved glycemic control through multiple complementary mechanisms Central Nervous System Effects Appetite Regulation Both GIP and GLP-1 receptors are expressed in brain regions controlling appetite and food intake: Reduced food intake and appetite through central nervous system receptor activation Promotion of satiety signals leading to decreased caloric consumption Potential modulation of reward-related feeding behaviors Weight loss effects that appear mediated through both homeostatic and hedonic feeding pathways Clinical trials have demonstrated substantial weight reduction, with participants experiencing decreased appetite as a commonly reported effect of GLP2 treatment

The Rybelsus Summary of Product Characteristics notes that it can increase levothyroxine exposure
Ren, J., Ding, X., Funk, G
Visceral fat tends to decrease
They emphasize that obesity medications arent a quick fix or a substitute for a healthy diet and exercise. Moreover, having to take the medications indefinitely to keep the weight from coming back while navigating side effects and limits on insurance access can be frustrating features of many patients journeys. But whats undeniable is that the new drugs, whether repurposed or novel agents, like tirzepatide, have robust clinical effectiveness and can even be cost-effective, depending on the price
In a nutshell: buyer beware