What is a jejunum brake?

A jejunum brake, also known as jejunal brake, refers to a physiological mechanism in the small intestine, particularly the jejunum, that regulates the rate of gastric emptying and intestinal motility. When nutrients, especially fats or carbohydrates, are detected in the jejunum, this mechanism slows down the movement of food from the stomach to allow for better digestion and absorption. It helps maintain an optimal environment for nutrient processing and prevents overloading the intestines.