Fat has twice the energy of carbohydrates, making them a compact power source that is stored in the body for use in times of low consumption of carbohydrates. It is clear that animals need to store fat for reserves for the cold weather or low food intake and so does the human body. However, in countries where there is always plenty of food and machines have replaced human labor, the accumulation of body fat has become a real concern for health.
The dietary fats are broken down into fatty acids enter the blood to form triglycerides own body. Fatty acids that contain the largest possible number of hydrogen atoms in the carbon chain saturated fatty acids are called, which come mainly from animals. Saturated fatty acids are those that have lost hydrogen atoms. This group includes monounsaturated fatty acids that have lost only one pair of hydrogen atoms and poliinsarurados fatty acids, which will take more than a couple.
Polyunsaturated fats are found mainly in seed oils. We have detected that saturated fats raise the level of blood cholesterol, while unsaturated tend to decrease. Saturated fats are usually solid at room temperature, unsaturated fats are liquid.