The brain is responsible for controlling and managing the human body. It does so using a variety of control mechanisms, one of which is the body’s hormone system. These hormones regulate various bodily functions, including digestion and metabolism. Glucagon-like peptide-1, also called GLP-1, are a class of hormones that help regulate these digestive and metabolic processes. Research suggests that elevated GLP-1 levels indicate to the brain that its appetite is full. Thus, it helps regulate food intake. However, experts believe that some people’s brains may be immune to GLP-1. In other cases, their bodies do not produce enough GLP-1 for their brains to register their signals. Such people are prone to overeating as their brains cannot tell when they are full. Medicines like Mounjaro and Wegovy can help such people rein in their appetites.