Lipid metabolism refers to the processes by which the body breaks down and utilizes fats for energy. This includes the digestion of dietary fats, their absorption in the intestines, and their transport through the bloodstream. Lipids, such as triglycerides and cholesterol, are essential for various bodily functions, including hormone production and cell membrane structure. The liver plays a crucial role in lipid metabolism by converting excess carbohydrates and proteins into fatty acids, which can be stored as fat. Additionally, lipoproteins, such as LDL and HDL, help transport lipids to and from cells, ensuring that the body has the necessary energy and building blocks for growth and repair.