Average of 18 % of adult body is composed of fat. Generally, there is much more fat in women
body than men body. When person eats more than he/she needed, proportion of body fat increases.
When he eats less it decreases. So body fat is main energy store of human body. When energy is not
taken adequately, body uses this store. Fat is the most energy giving element. Some of vitamins are
taken to body with fat. Since fat leaves stomach slowly it gives satisfaction. Fat layer under the skin
regulates body for temperature. Some of the faty acids are needed for the synthesis of some hormones that are needed for body regulation.