The video tutorial explains bile acid synthesis from cholesterol in the liver, detailing the classic and alternative pathways. It covers the structural modifications of cholesterol, the role of enzymes like CYP 7A and CYP 27A1, and the formation of primary bile acids. The tutorial also discusses the conjugation of bile acids to amino acids, forming bile salts, and their function in digestion. Finally, it describes the conversion of primary bile acids to secondary bile acids by bacterial enzymes.

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