Gastric Inhibitory Polypeptide (GIP) is a hormone produced by the K cells in the small intestine. It plays a crucial role in the digestive process by inhibiting gastric acid secretion and slowing down gastric emptying. This helps regulate the rate at which food moves from the stomach to the intestines, allowing for better nutrient absorption. In addition to its inhibitory effects, GIP also stimulates insulin secretion from the pancreas in response to food intake. This action is part of the body's way of managing blood sugar levels after meals, making GIP an important player in glucose metabolism and overall energy balance.