Cholesterol-d₇is intended for use as an internal standard for the quantification of cholesterol by GC- or LC-MS. Cholesterol is a major sterol produced in mammalian cells that is required for cell viability and proliferation.¹It is a component of mammalian cell membranes that interacts with membrane phospholipids, sphingolipids, and proteins to influence their behavior. Cholesterol is a precursor of steroid hormones, bile acids, and the active form of vitamin D. Impaired cholesterol homeostasis is related to development of various diseases including fatty liver, diabetes, gallstones, dyslipidemia, atherosclerosis, heart attack, and stroke.²

1.Ohvo-RekilÄ, H., Ramstedt, B., LeppimÄki, P., et al.Cholesterol interactions with phospholipids in membranesProg. Lipid Res.41(1)66-97(2002) 2.Yamanashi, Y., Takada, T., and Suzuki, H.Associations between lifestyle-related diseases and transporters involved in intestinal absorption and biliary excretion of cholesterolBiol. Pharm. Bull.41(1)1-10(2018)