Meat

On the whole way of becoming and forming as a biological species, a man used meat for food. If our ancestors did not engage in hunting, getting themselves game for livelihood, now simply humanity did not exist, did not survive, would not survive the ice age and would not have reached the modern stage of development.

The balance of the diet, the main nutrients of animal and vegetable origin in human nutrition, ensures the optimal flow of metabolic processes in the body, which plays a leading role in ensuring its vital activity. Experts believe that the number of animal proteins should be from 50 to 60% of the total daily intake of proteins, and animal fats - at least 70% of the total amount of consumed fats. For six-year-old children, the need for animal protein should be covered by 65% ​​of the daily allowance, and from the age of seven, by 60%.As for the proportions of the content of animals and vegetable fats in the daily menu, it should be 80% and 20%, respectively.

Only in animal food, and more simply, in meat, milk and fish, there are proteins containing a full set of amino acids, including irreplaceable. An exception is only some plants used for food, such as soy, peas, and beans. Comparing the biological value of proteins contained in various foods, having accepted the value of milk proteins for 100, we can say that the biological value of meat and fish proteins is 95, rye bread - 75, rice - 58, and wheat bread - 50. In bread for reasons ofincrease its biological value, often add an essential amino acid lysine. Data on the value of food products by the protein content criterion are presented in Table 1.

Not all the amount of food that has entered the body is absorbed, part of it is emitted from the intestine in the form of slags. The percentage of digestibility of animal food averaged 95%, plant - 80%, and mixed - 82-90%.

The lack of food protein, as well as its excessive intake in the body have a negative impact on the state of human health. This problem occupies one of the first places in a number of risk factors for the emergence of diseases of civilization. It should be remembered the fact that proteins of low quality are only partially utilized, which can lead to excessively high loads on the metabolic systems of the organism due to the need to process the "extra" protein to the final products of decay( or dispose of).In turn, this can have a negative effect on the condition of the walls of the blood vessels, creating an elevated pool of protein bodies in the blood. This circumstance is one of the triggers in the pathogenesis of atherosclerotic vascular lesions. .. more

Materials used:
Shilov VN, Mits'yo VP"Healthy food"