Cholesterol is widely used in the pharmaceutical industry as a key ingredient in the formulation of liposomes, which are used for drug delivery systems. Its role in stabilizing the lipid bilayer structure enhances the efficiency of targeted drug delivery, particularly in cancer therapies and vaccines. In the cosmetic industry, cholesterol is incorporated into skincare products for its moisturizing and skin-barrier repair properties, helping to maintain skin elasticity and hydration. It is also utilized in the production of steroid hormones, such as cortisol, estrogen, and testosterone, which are essential for various physiological functions. Additionally, cholesterol serves as a precursor for the synthesis of vitamin D, which is crucial for bone health and immune system regulation. In research, it is used as a standard in biochemical studies to understand lipid metabolism and its role in cardiovascular diseases.