What do all fats have in common?

All fats, regardless of their type, are composed of fatty acids and glycerol, which are the basic building blocks of lipids. They are hydrophobic, meaning they do not mix with water, and are primarily used by the body for energy storage, insulation, and protection of vital organs. Additionally, fats play a crucial role in the absorption of fat-soluble vitamins (A, D, E, and K) and are essential for various biological functions.