Fats include besides carbohydrates and proteins to the main constituents of the human diet and are therefore important energy supplier. Fats are composed of a glycerol molecule and 3 fatty acids.

Fats serve the body primarily as an energy source. However, they also help institutions to protect and take vitamins such as kidney, liver and brain. They also have a flavor carrier and prolong satiety.

Taking too little grease to be, it can lead to a lack of energy. With a lack of energy metabolism does not work properly and the body is unable to provide its full power. An excessive consumption may lead to obesity and thus to limit the quality of life and life expectancy. Plant and animal foods are rich in fats.

Fatty acids are constituents of fats and can be divided into saturated, monounsaturated and polyunsaturated fatty acids. In addition, there are the trans fats.