Proteins contained in meat animals have specific amino acids that can not be obtained by eating other products. The human body can not synthesize their own. If completely excluded from the diet of meat, the body no longer receives these amino acids, which can lead to disruption of the growth process, various diseases, and other undesirable consequences. Particularly harmful giving up meat for people who play sports or have chosen the work related to strenuous.
The problem lies in the fact that in many plant foods enough iron, calcium, and other useful substances for the human body. In addition, people are also needed and fats, and to meet the daily need for them, a vegetarian to eat about 5 kg of vegetables, fruits, etc., Though more than half of them must be related to oilseeds. In particular, it is about olives, soybeans, peanuts, almonds, walnuts and pine nuts, and so on. But that is not enough, since the vegetable fat, unlike animals do not contain steroids that are necessary for the formation of some hormones and bile acids.
Vegetarians often claim that their particular food contribute to weight loss. In fact, this is not always the case, because if we go with the meat sweet rolls, fried potatoes, cakes, etc., the situation will only get worse. On the other hand, people who eat only fruits and vegetables, though in small amounts, lose weight really fast, but at the same time they often begin to feel tired, lose their physical form, gets tired quickly.