Fat is a macronutrient which is needed in small amounts in the human body. Although needed in small amounts, but it is such an essential component that survival is not possible without fats. Our body requires small portions of fat in order to function properly and to prevent diseases. Unfortunately, many modern diets that people are using these days contain far greater amount of fats than is actually required. This large amount of fat, especially bad fat, can cause health complaints including obesity and heart diseases.