Fat is essential for our body but in limited quantities. It is contained in the tissues of our body. The excess of fat is an obstacle leading to the various disorders. Extra fat gets deposited gradually in:

The surface layer of the heart
The loose tissues around the kidneys and
The supporting tissues within the abdomen
Heart muscles contract in order to pump blood, when the fat deposits create an overload, the heat muscles can do nothing but over work in the process of supplying blood to the tissues, causing discomfort to the heart. Blood get the nutrition from the intestines through the food we take. When the proportion of fat content exceeds the limit, the blood gets thickened and the heart muscles have to overwork in pumping the blood. In spite of the hearts constant pumping the walls of the blood vessels (arteries) get thickened. the type of food we take, therefore, has a determinant effect in gaining weight.