Fats, also called lipids, is a substance that is rich in energy, serves as the primary source of energy for the body’s metabolic processes. Fats that circulate in the body that is derived from two sources of food and production of liver, which can be stored in fat cells as energy reserves. The function of fat is as a source of energy, protective organ, cell formation, a source of essential fatty acids, fat soluble vitamins conveyances, conserve protein, give a sense of fullness and delicacy, as a lubricant, and maintain body temperature. Clinically, the fat that matters is:

There are four types of fat / lipid as described below:
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Fiber is coming from Cellulose, while cellulose is coming from carbohydrates. Fiber itself often comes from complex carbohydrates that we have discuss in earlier articles.

Fiber used to be used as and index in judging food quality. The higher amount of the fiber inside the food, then the nutrient values of the food is decreasing, its because fiber are consider as materials that is not digestible. But later, researchers agree that fiber are indeed needed by human, without it, it could result in constipation.
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