The classifications of lipids and their importance and functions are discussed clearly in this post. Lipids are substances made up of fatty acids or fatty acid by-products that are not soluble in water instead soluble in organic solvents such as waxes, steroids, and natural oils. These molecules can be generated in the human body’s liver and can be found in a variety of foods such as cheese, whole milk, oil, fried dishes, butter, and even some red meats. Lipids are a class of organic substances that are made up of fats and oils, among other things. The enzyme lipase is responsible for the breakdown of lipids into fatty acids and glycerol, which is aided by bile produced in the liver. Lipid metabolism is the process by which fatty acids are oxidised in order to provide energy for the production of new lipids from small molecules. Because glucose products are transformed into lipids, the metabolism of lipids is closely connected with the metabolism of carbohydrates.