Where does the protein in the body and what products does it come from?

There is no doubt that any living organismneeds a full-fledged diet that contains all types of nutrients. Without minimizing the importance of carbohydrates and fats, we will pay more attention to proteins. This component of food, of course, is very important. Where is the protein contained in the human body and other animals? In all tissues of the body. Also, all the biochemical reactions are controlled by enzyme proteins.

In addition, proteins perform a large numberother functions. One of the first questions about them is the following: "Where is the protein contained?" Namely: we are interested in what foods are rich in proteins.

It should be said that proteins are plant andanimals of their origin. It is clear that the first we get from plant foods, the latter from animal products. By the way, they differ in composition, that is, they are synthesized from various amino acids and "collected" in a different order. But for our body it does not matter which protein comes with food, any protein is split in the digestive tract into "parts" - amino acids. These are organic acids that build a complex protein molecule. They are transported after absorption in the intestine into organs and tissues, and each cell synthesizes its own, unique proteins for a particular organism. That is why it is so important what kind of amino acids the protein contains.

The fact is that about 2/5 of them areirreplaceable. This means that the body can not synthesize them from other amino acids. Therefore, we must receive them with food. By the presence of essential amino acids, proteins are divided into full and inferior. Accordingly, the first contain all the necessary structural units of the protein, the latter - no.

Irreplaceable amino acids are contained in meat, chicken, fish, dairy products, eggs,cereals, legumes, nuts and seeds. For our body there is a set of these substances (as opposed to their aggregate for other animals). Some amino acids are partially replaceable by others having a similar structure, for example, the deficiency of phenylalanine can be replenished with tyrosine, and arginine with glutamic acid.

So, where is the protein found?In what foods can we detect it? Practically in all the food that we consume daily. No wonder, because a significant part of the body of an animal or plant consists precisely of proteins. However, it is better to clarify: "What foods contain a lot of protein?"

First let's talk about animal proteins.In record numbers, they are present in all kinds of meat, including bird and any game, in fish, liver, cheese, eggs, cottage cheese, milk. It is also important that the meat has essential amino acids: lysine, methionine and tryptophan in an ideal proportion - 5.5: 3.5: 1.

Where does protein come from when it comes to vegetable products? Most of it in beans, lentils, nuts, seeds, soy, Brussels sprouts, cereals (wheat, rye, buckwheat).