Cholesterol is widely used in the pharmaceutical industry as a raw material for the synthesis of steroid hormones, including cortisol, aldosterone, and sex hormones like estrogen and testosterone. It serves as a crucial component in the production of vitamin D when the skin is exposed to sunlight. In the cosmetic industry, cholesterol is utilized as an emollient and emulsifier in skincare products, helping to maintain skin hydration and improve texture. It is also employed in liposome formulations for drug delivery systems, enhancing the stability and bioavailability of therapeutic agents. Additionally, cholesterol is a key ingredient in cell culture media, supporting the growth and maintenance of mammalian cells in research and biotechnology applications.