Fats are actually called lipids and are also known as triglycerides. Lipids have been given a bad reputation in the past because lipids contain more calories, ounce for ounce, than protein or carbohydrates.
Each ounce of lipids contains more than twice the calories of an ounce of protein or carbohydrates
Functions of Lipids
Serving as a backup energy source after glycogen stores are depleted
Regulating body temperature
Acting as a structural component of every cell membrane and organ tissue
Starting chemical reactions that control growth and immune function