The role of substances for the human body.
The presence of iron.
The iron is in abundance in the liver, fish, poultry, kidneys, spleen and animal meat. In addition, iron is also found in cereals, bread, raisins, nuts, dried fruits, but, unfortunately, iron from them is hardly absorbed into the intestines. A healthy human body contains about 4 grams of iron, and the bulk is part of hemoglobin. Hemoglobin is the carrier of oxygen in the body. Hemoglobin performs the function of transporting oxygen in skeletal muscles and the heart muscle (in its composition contains iron). Iron contains many enzymes that take part in the processes of oxidation and the production of food energy. For the multiplication of cells and the biosynthesis of hemoglobin, iron is needed, which comes with food. The deposition of iron usually occurs in the bone marrow, liver, spleen. Meat products should be eaten along with fresh vegetables or fruits that contain vitamin C, which allows the iron to be absorbed into the body.
The presence of calcium.
Most of the calcium comes in dairy products, green vegetables (parsley, dill and onions). Despite the fact that vegetables are rich in calcium, its digestibility by the body is low. Calcium performs a role for a person double: regulatory and structural. A large amount of calcium in the body is in the bones and teeth and is a compound with phosphorus, due to which the elements of bone are joined. Teenagers or children need a large amount of calcium, so that the teeth and bones of the skeleton grow, the nervous system can function fully, and that muscle contractions occur. Thanks to calcium, muscle cramps are prevented, and blood coagulation occurs.
For young children, improper absorption of calcium leads to the development of rickets, as a result of which the correct development of the bone system is disturbed. In adults, a lack of calcium leads to softening of the bones, as a result of which they become brittle, fragile, and eventually develops osteoporosis. The body should consume 1200 mg of calcium per day (for adolescents) and up to 1000 mg (for adults) per day. For pregnant and breast-feeding, the need for calcium, respectively, is higher.
The presence of zinc.
A large amount of zinc can be found in nuts, eggs, whole grains, beans, peas, etc. Zinc, found in plant foods, is poorly absorbed into the intestines. In the case when zinc is not enough, it is difficult for a person to feel the taste of food, lose appetite, the immune system is weakened and the body becomes sensitive to colds and infectious diseases, wounds and scratches are healed for a long time. Zinc plays a big role in the growth and maintenance of immunity. Zinc consists of more than 100 enzymes, hormones, proteins, actively participating in biochemical reactions. Thanks to zinc, normal male sex cells (spermatozoa) are formed. Most of all zinc is in the testicles.
The presence of iodine.
A high content of iodine can be found in seafood or plants that grow on the coasts. If water or soil contains a small amount of iodine, then it will also be missed in food. Thyroid hormones contain iodine, and when it is not enough, the gland function is significantly reduced. Element of iodine is needed for the full functioning and development of the brain, in order to grow tissues and biosynthesis of proteins. In the case of a shortage of these substances for a person, the thyroid gland begins to increase. Lack of iodine can occur in childhood, and therefore, prevention is necessary.