Retatrutide is a GGG tri-agonist that targets GLP-1 and GIP receptors, akin to standard GLP-1 agonists, but also uniquely activates the glucagon receptor. This extra receptor interaction enhances glucagon production, leading to the breakdown of stored fats and glycogen, thereby increasing basal metabolism for more consistent fat loss. Its actions on GLP-1 and GIP receptors promote delayed gastric emptying and appetite control, offering a comprehensive approach to obesity research distinct from older GLP-1 agonists.