vital role
Proteins form the structure of muscles, tendons, bones and other tissues. Without the proteins, the body is unable to repair damaged tissue and produce new cells for growth and to prevent attacks from the outside world. Equally vital is the role that hormones and enzymes, which have the task to stimulate and regulate the chemical reactions and physiological functions.
A protein molecule contains carbon, hydrogen, oxygen and nitrogen atoms, and sometimes phosphorus and sulfur atoms. E 'consists of one or more chains of amino acids, which are reconstructed in the body from the amino acids derived from proteins in food. Any excess protein that the body can not use is converted into glucose to provide energy or to be stored as fat. The proteins can provide the same energy of carbohydrates, but their primary value lies in being the "building blocks of the body and all cells.
proteins are required in smaller amounts than carbohydrates: about 40-60 grams a day is enough for most adults. Since meat is made for about a fifth of proteins (the rest is water and fat), means that it should eat about 225 grams a day, always considering the flesh as the only food that contains protein. The bread, which is composed of less than a tenth of a protein, should be taken in about 450 g per day.
Most people mistakenly believes that meat is the best source of protein and that other forms are secondary. In general, Westerners assume a variety of foods containing proteins that make up most of the daily needs: meat, fish, eggs, cheese, yogurt, milk, bread, peas, beans, cereals do breakfast of wheat and oats, nuts; even potatoes make a small amount of protein to your diet. However, the recruitment of proteins in large quantities is not advisable, since the excess is then processed and stored as fat, producing nitrogenous waste difficult to dispose of and, if in excess, can cause various damage to the body.
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