A triglyceride is broken down into two fatty acids and a monoglyceride, which are absorbed by the villi on the intestine walls. After being transferred across the intestinal membrane, the fatty acids reform into triglycerides (re-esterified), before being absorbed into the lymphatic system through lacteals. Without bile salts, most of the lipids in food would be excreted in feces, undigested.Since bile increases the absorption of fats, it is an important part of the absorption of the fat-soluble substances, such as the vitamins A, D, E, and K.Besides its digestive function, bile serves also as the route of excretion for bilirubin, a byproduct of red blood cells recycled by the liver. Bilirubin derives from hemoglobin by glucuronidation. Bile tends to be alkaline on average. The pH of common duct bile (7.50 to 8.05) is higher than that of the corresponding gallbladder bile (6.80 to 7.65). Bile in the gallbladder becomes more acidic the longer a person goes without eating, though resting slows this fall in pH. As an alkali, it also has the function of neutralizing excess stomach acid before it enters the duodenum, the first section of the small intestine. Bile salts also act as bactericides, destroying many of the microbes that may be present in the food. Clinical significance
In the absence of bile, fats become indigestible and are instead excreted in feces, a condition called steatorrhea. Feces lack their characteristic brown color and instead are white or gray, and greasy. Steatorrhea can lead to deficiencies in essential fatty acids and fat-soluble vitamins.
This mixture, called bile soap or gall soap, can be applied to textiles a few hours before washing as a traditional and effective method for removing various kinds of tough stains. Food
"Pinapaitan" is a dish in Philippine cuisine that uses bile as flavoring. Other areas where bile is commonly used as a cooking ingredient include Laos and northern parts of Thailand. Bears
In regions where bile products are a popular ingredient in traditional medicine, the use of bears in bile-farming has been widespread. This practice has been condemned by activists, and some pharmaceutical companies have developed synthetic (non-ursine) alternatives. Principal acids
See also
Bile acid sequestrant
Enterohepatic circulation
Intestinal juice

References
Seleem HM, Nada AS, Naguib MA, Abdelmaksoud OR, El-Gazzarah AR. Serum immunoglobulin G4 in patients with nonmalignant common bile duct stricture. Menoufia Med J [serial online] 2021 [cited 2022 Jan 21];34:1275-83. Available from: http://www.mmj.eg.net/text.asp?2021/34/4/1275/333263

Bibliography
Bowen, R. (2001-11-23). "Secretion of Bile and the Role of Bile Acids In Digestion". Colorado State Hypertextbook article on Bile. Archived from the original on 29 May 2007. Retrieved 2007-07-17. Krejčí, Z; Hanuš L.; Podstatová H.; Reifová E (1983). "A contribution to the problems of the pathogenesis and microbial etiology of cholelithiasis". Acta Universitatis Palackianae Olomucensis Facultatis Medicae. 104: 279–286. PMID 6222611. Maton, Anthea; Jean Hopkins; Charles William McLaughlin; Susan Johnson; Maryanna Quon Warner; David LaHart; Jill D. Wright (1993). Human Biology and Health. Englewood Cliffs, New Jersey, USA: Prentice Hall. ISBN 0-13-981176-1.