CYP7A1(Cytochrome P450 family 7 subfamily A member 1) is a member of the cytochrome P450 superfamily of enzymes. CYP7A1 plays a crucial role as the rate-limiting enzyme in bile acid synthesis within the liver, a process essential for digesting and absorbing dietary fats and fat-soluble vitamins. CYP7A1 expression is primarily regulated by bile acid receptor FXR, which responds to bile acid levels in the body, ensuring a balanced metabolic response. Dysregulation of CYP7A1 can lead to various metabolic disorders, including cholesterol gallstone disease and liver dysfunction, highlighting CYP7A1′s importance in maintaining lipid homeostasis.