Bile juice is a fluid that is made and released by the liver and stored in the gallbladder. Its main function is to help with digestion by breaking down fats into fatty acids, which can be taken into the body by the digestive tract. Bile contains mostly cholesterol, bile acids (also called bile salts), bilirubin (a breakdown product of red blood cells), water, body salts (such as potassium and sodium), and copper and other metals (attached to proteins) . Bile is essential for the complete digestion of fats and, to some extent, of proteins and carbohydrates. It also helps in the absorption of various substances, including fat, iron, calcium, and vitamins. Bile salts act as emulsifiers to break down large fat globules into smaller emulsion droplets, providing a larger area for the fat-digesting enzymes to act, making the process quicker. Bile also carries excess cholesterol out of the body and dumps it into the gastrointestinal tract, where it can be passed out through the feces. Bile salts stimulate bowel movement (peristalsis) and help to maintain a suitable pH of the duodenal contents.