Lipids are a diverse group of organic compounds that are insoluble in water but soluble in organic solvents such as ether and chloroform. They are fatty or waxy substances that don’t dissolve in water and are important for the body to be able to make and use energy, vitamins, and hormones. Lipids are found in every cell of the body and are an essential component of the cell membrane. Some key types of lipids include:

• Triglycerides: These are fats and oils that are sequestered as fat in adipose cells, which serve as the energy-storage depot for organisms and also provide thermal insulation.

• Phospholipids: These are lipids that make up the cell membrane and provide cell protection and serve as a barrier to certain molecules.

• Cholesterol: This is a lipid in the blood that the body needs to help take in fats and vitamins and make hormones.

Lipids have a variety of functions in the body, including energy storage, insulation, and hormone production. They are also important components of biological membranes. Lipids can be found in many natural foods and synthetic compounds.