Food
The human body needs food to grow and to carry out all the vital processes necessary for it throughout its life. Food supplies the human body with the nutrients it needs and can not live without. The human body is always renewed and its needs vary according to the age at which it moves from one stage to another. And all six nutrients in the food pyramid are an urgent necessity that must be obtained daily and through food.
Fat formations are a concern for humans and a constant concern for the association of fat closely with chronic diseases, which has made them the concern of the doctor, dietitian and ordinary human being alike. Chemical labels such as cholesterol, saturated or unsaturated fatty acids have become frequent words on people’s tongues popularity.
Fats
A compound nutrient consisting of carbon, hydrogen and oxygen, which gives energy at a rate of 9 calories per gram, which is considered to be high in calories compared to carbohydrates, and protein for the body, each providing the body only 4 calories. The fats are classified in several classifications and are called lipids according to their chemical composition of fatty acids. There are simple lipids, complex lipids, derivative lipids which perform their functions in the human body according to their needs. The surplus is stored in the body as fatty masses that cause obesity and its dangers.
The body needs fat
The body needs about 20% of the total calories required per day, on the basis that the body needs the equivalent of 1-2 grams per kilogram of fat for body weight, depending on the type of work, and age.
Children need more, they are growing, needing about 2-3 grams per kilogram of body weight.
Digestion of fat
The actual digestion of fat begins in the small intestine with an enzyme produced by the pancreas and yellow salts in the liver. Yellow salts help to form an emulsifier and the acidity of the food. The enzyme produced by the pancreas converts fats into glycerol and fatty acids. A third of the fatty acids only turn into bipolar glycerides The rest is stored as fatty masses in the body.
The digestion of fat in the small intestine without the need for water, unlike carbohydrates and proteins that must be mixed with water to digest. The concentrated black syrup transforms complex fats into a greasy emulsion of any fat droplets suspended to make it easier to convert them into fatty acids, glycerol. The lining of the stomach secrete the enzyme L-lase, which helps digest fat and convert it into simple compounds in preparation for reaching the small intestine to complete the digestion there.