Gastric inhibitory peptide (GIP) is a hormone produced by the small intestine in response to food intake, particularly fats and carbohydrates. Its primary role is to inhibit gastric motility and secretion, helping to slow down the emptying of the stomach. This allows for better digestion and absorption of nutrients in the intestines. In addition to its inhibitory effects, GIP also stimulates the release of insulin from the pancreas when glucose levels rise. This function is crucial for regulating blood sugar levels after meals, making GIP an important player in the body's metabolic processes.