Definition
Cholecystokinin (CCK) is a hormone released by the small intestine. It stimulates the release of digestive enzymes from the pancreas and bile from the gallbladder. CCK also promotes feelings of fullness after eating. Consider it the digestive system's cleanup crew coordinator. It ensures that the right enzymes and bile are available when needed. CCK plays a crucial role in fat digestion. Its release is triggered by the presence of fats and proteins in the small intestine.