carbon, hydrogen, and oxygen
Lipids are organic compounds that contain mainly carbon, hydrogen, and oxygen. They include substances such as fats and oils, as well as waxes, sterols, some vitamins A, D, E and K and phospholipids. Lipid molecules consist of fatty acids, with or without additional molecules. Fatty acids are organic compounds that have the general formula CH 3 CH 2 n COOH, where n usually ranges from 2 to 28 and is always an even number.