zinc is a kind of trace elements, and its content in human body and daily intake are very small, but it can play a decisive role in the body's sexual development, sexual function and the generation of germ cells, so it is called "the spark of life" and "the harmonious element of marriage".

The normal zinc content of human body is 2-3g. A very small amount of zinc is distributed in most tissues, among which the content is high in liver, muscle and bone. Zinc is the main component of ten enzymes in the body. Zinc is also related to brain development and intelligence. An American university found that the zinc content of smart and well-studied teenagers is higher than that of stupid < P > dull ones. Zinc can also promote the proliferation and activity of lymphocytes, and it has wonderful effects on maintaining the normal epithelial and mucosal tissues, preventing the invasion of bacteria and viruses, promoting the healing of wounds, reducing skin lesions such as acne, and correcting taste failure.

zinc deficiency

When zinc deficiency occurs, all systems in the whole body will be adversely affected. In particular, it has a more direct effect on puberty gonadal maturation. When young men in the Nile Delta of Egypt suffer from zinc deficiency, the main manifestations are growth stagnation and hypogonadism. In Iran, studies have confirmed that girls and school-age children have growth retardation and sexual maturity retardation. < P > After the food is fortified with zinc, the patients' development will soon become normal.

Animal experiments have confirmed that the brains of zinc-deficient animals are stunted.

zinc deficiency in some tissues of the eyeball will affect the photochemical process and make vision abnormal.

Zinc is also a component of insulin. When the zinc content in the pancreas drops to half of the normal level, there is the possibility of diabetes.

zinc deficiency

the dietary structure of Chinese people is mainly cereal, and the bioavailability of zinc in cereal is very low, only 21-41%. If children eat more refined foods,

too much zinc content is lost, which is more likely to lead to zinc deficiency.

(1) Etiology:

1. Insufficient zinc intake. The zinc content in breast milk colostrum is higher than that in mature milk. Failure to feed breast milk or insufficient breast milk after birth and failure to add zinc-rich complementary food in time can lead to insufficient zinc intake

.

2. zinc malabsorption, such as chronic digestive diseases, can affect the absorption and utilization of zinc.

3. The zinc requirement increases, and children with rapid growth and development are prone to zinc deficiency.

4. Excessive zinc loss, such as nephrotic syndrome; Hemolytic anemia is treated with diuretics, steroids and membrane dialysis. Excessive intake of iron and calcium increases the loss of zinc.

(2) Clinical manifestations:

The onset is slow, and the main symptoms are decreased taste, loss of appetite, recurrent oral ulcer and pica. Backward growth and development, sexual retardation, listlessness, skin wet diagnosis, blisters or ulcers, persistent dermatitis, hair loss, infectious diseases, slow wound healing, etc. often occur at the junction of skin and mucosa and extremities. Zinc deficiency in pregnant women can cause fetal dysplasia. In addition, it can be accompanied by night blindness because it affects the operation of vitamin A.

(3) Diagnosis:

According to dietary survey, clinical manifestations, determination of serum zinc level and comprehensive judgment after zinc supplementation.

(4) Prevention:

Sticking to a balanced diet is the main measure to prevent zinc deficiency. Generally speaking, breast milk, especially colostrum, contains the most zinc, so it is of great significance to advocate breast feeding to prevent zinc deficiency. Animal foods are not only rich in zinc, but also have high utilization rate, and nuts are not low in zinc.

(5) Treatment:

1. Remove the cause of zinc deficiency.

2. Adjust diet: actively supplement various zinc-rich animal foods such as liver, lean meat, egg yolk and fish.

3. supplement zinc.

4. protein intake should be increased and iron deficiency anemia should be treated while taking zinc, which can improve zinc deficiency faster.

food source

a balanced diet of normal people can provide about 11-21 mg of zinc for human body every day, but only 2-3 mg can be used. The main substance affecting zinc absorption is plant acid, which can form insoluble salts with zinc in the intestine. A large amount of dietary cellulose also affects the utilization of zinc.

to ensure that there is enough zinc in the body, we should first adjust our diet. Animal foods in protein, such as fish, meat, liver, kidney and shellfish, are rich in available zinc < P >, and zinc deficiency can be reasonably matched in the diet.

Special uses

(The role of zinc in sexual activity)

Testis, prostate and semen of human body all contain high concentrations of zinc. When the content of zinc in human body is deficient, sexual function will be reduced, and testosterone < P > synthesis enzyme will be disordered, which will cause impotence and acne on the face of men. Zinc plays a special role in stimulating sperm motility, and zinc deficiency will lead to the decline of sperm motility.

Long-term zinc deficiency and failure to replenish it in time may lead to a significant decrease in sperm count and testicular atrophy, and finally lead to infertility.

According to the World Health Organization, the daily zinc intake of adults is 1.5 mg, while that of Chinese men is only about 9 mg. There are several reasons that lead to insufficient intake of zinc from food:

First, a large number of chemical fertilizers are applied in the land, and the grown grain is generally deficient in zinc;

Second, after deep processing, the content of zinc in food can be reduced;

thirdly, drinking and eating sugar also consumes some zinc. People are prone to zinc deficiency, especially married young men, because they are at the peak of their sexual life, that is, they lose a considerable amount of zinc with semen when they drink less zinc than they eat.

zinc deficiency in human body can be supplemented by adjusting diet in general. Shellfish foods such as oysters, clams, oysters, mussels, etc. all contain more zinc, and in terms of zinc content, oysters are the first to be promoted, and the zinc content of oysters is 111 mg based on 111 grams of food. Other foods such as animal liver, coarse grains, fish, meat and eggs also contain a considerable amount of zinc, and the content of zinc in water < P > fruit is the least.

In a word, zinc plays a leading role in sexual activity and plays an important role in maintaining reproductive function. Therefore, it is suggested that young male friends should drink as little as possible every day, and appropriately < P > increase the intake of some foods with high zinc content, so as not to affect your reproductive function. Which male infertility patients need zinc supplementation < P > As we have mentioned in the relevant content, testicles, prostate and semen are rich in zinc. Because the seminal plasma in semen is mainly secreted by prostate fraction < P >, checking the zinc content in seminal plasma can be used as an index to monitor prostate function.

The researchers found that zinc plays an important role in maintaining this physiological state during the long pre-fertilization process such as sperm maturation, transportation, migration and capacitation in female reproductive tract. Sperm absorbs zinc from seminal plasma during ejaculation, and combines with sulfhydryl group of nuclear chromatin, so as to avoid premature depolymerization of chromatin, which is beneficial to sperm reception. Zinc can also delay the lipid oxidation of sperm membrane, maintain the stability and permeability of cell membrane structure, and keep sperm in good mobility.

In addition, there are many enzymes involved in the process of testosterone synthesis by leydig cells of testis. When zinc is deficient in vivo, the properties and functions of these enzymes will change, which will reduce the amount of testosterone synthesis and secretion by leydig cells of testis.

Male infertility caused by zinc deficiency can be seen in oligozoospermia with reduced sperm count and azoospermia with poor sperm motility. Therefore, when encountering the above situation, you can < P > check the zinc content in seminal plasma, and if it is the cause of zinc deficiency, you can use zinc supplementation for treatment. Generally, 1.5% zinc sulfate solution can be taken after meals, 21 ml each time, 3 times a day. High-zinc foods, such as oysters and animal liver, can also be used to treat such patients, which can also make them have fertility. Moreover, it is < P > that there is no condition to detect zinc content, and zinc supplementation with food will not cause adverse effects on the body.

zinc gluconate

(properties and stability) zinc gluconate is white crystal or granular powder; Soluble in water, insoluble in ethanol, chloroform and ether. The preparation of this product requires shading and dense < P > closed storage.

(In vivo process) Zinc gluconate is mainly absorbed by the small intestine after oral administration, and the serum zinc concentration reaches a peak after 1 hours, and begins to decrease after about 2 hours. It can be widely distributed in liver, intestine, spleen, pancreas, heart, kidney, lung, muscle, central nervous system and bones. It is mainly excreted by feces, with a small amount excreted by urine and milk. Under the condition of similar zinc content < P >, the bioavailability of this product is 1.6 times that of zinc sulfate.

(drug action) zinc exists in many enzyme systems, such as carbonic anhydrase, respiratory enzyme, lactic dehydrogenase, superoxide dismutase, alkaline phosphatase, enzymes in dna and rna poly

, and is necessary for the synthesis of nucleic acids, protein, carbohydrates and the utilization of vitamin A. Zinc can promote growth and improve taste. When zinc < P > is deficient, there will be taste, poor sense of smell, anorexia, and lower growth and intellectual development than normal.

(Indication) Zinc gluconate is a zinc supplement, which is mainly used for growth retardation, malnutrition, anorexia,

recurrent oral ulcer, skin acne and other symptoms caused by zinc deficiency in infants and the elderly and pregnant women.

(Adverse reactions and precautions) Symptoms of gastrointestinal irritation such as stomach discomfort, nausea or vomiting can be seen. But the irritation of digestive tract is less than that of zinc sulfate.

Excessive zinc can cause lead and iron deficiency, which interferes with their absorption and utilization. Excessive zinc intake can affect the metabolism of ketone and iron ions.

(drug interaction) The combination of this product with aluminum, calcium, strontium salt, borax, sulfate and hydroxide (alkali), protein silver and tannic acid is contraindicated. Combined with penicillamine, the effect of penicillamine can be weakened < P >.

(usage and dosage) oral. 11 milligrams a day for adults. Children should reduce their weight as appropriate.

zinc (zn) zinc is a trace element in the body, which is second only to iron, but it was not known until 1961s that zinc is also an essential nutrient for human body.

zinc is a component of many enzymes. It is said that there are more than 111 enzymes in human body containing zinc. In addition, zinc is related to the synthesis of protein and the metabolism of dna and rna. Zinc is needed for the transport of carbon dioxide in blood < P > cells, the normal calcification of bones, the development and maintenance of normal function of reproductive organs, the healing of wounds and burns, the normal function of insulin and the acute taste of physique.

human colostrum is a good source of zinc. The bioavailability of zinc in different foods varies greatly, and the bioavailability of zinc in meat and seafood is much higher than that in vegetables.

Don't treat zinc-containing drugs as tonics

Zinc is an indispensable trace element in human body. If children are short of zinc, it will affect their growth and mental retardation. If the child does not lack zinc and supplements it indiscriminately, it will be worse.

what is the reason? It turns out that trace elements in the human body have a certain content and proportion, which is neither indispensable nor excessive. Infants and young children grow and develop rapidly, and the demand for zinc < P > is relatively large, but not as much as possible. If zinc-containing drugs are taken by children every day, it will be harmful to health. Excessive zinc supplementation can reduce the contents of vitamin C and iron in the body, inhibit the absorption and utilization of iron, and thus cause iron deficiency anemia. When there is too much zinc and < P > too little calcium in children's bodies, under the action of magnesium ions, the activity of phagocytes can be inhibited, the immunity will be reduced, and the disease resistance will be poor. Taking zinc-containing drugs to children often < P > will also increase the ratio of zinc and copper in the body, affect the metabolism of cholesterol, increase blood lipids, promote atherosclerosis of arteries, and lay a hidden danger for cardiovascular and cerebrovascular diseases in the future. In addition, the zinc content in the body is too high, which has the risk of inducing cancer.

It can be seen that parents should have a correct understanding of zinc and learn scientific parenting methods in order to prevent zinc deficiency in children. The first is to breastfeed, because < P > there is enough zinc in breast milk for the growth and development of babies; Children should be gradually supplemented with complementary foods from 4 months, especially lean meat, eggs, animal liver, oysters < P >, peanuts, walnuts and other foods with high zinc content, which can be eaten by children according to specific conditions; It is necessary to educate children from an early age to develop a good habit of not being picky about food and not being partial to food, pay attention to a reasonable and balanced diet, and mix coarse and coarse grains, so that children will generally not be short of zinc. Usually, children should also be careful not to eat too much sugar and sweets, so as not to affect the absorption of zinc.

If children are found to have anorexia or pica due to zinc deficiency, they should go to the hospital to ask a doctor to check the zinc content in their hair or blood, and make zinc supplements according to the needs of their bodies. Zinc drugs should never be regarded as omnipotent "nutritional tonics" to prevent harm to children's health.

Baby is sweating, beware of zinc deficiency. Wuhan Morning News (correspondent Luo Huarong) 2112-11-12 17:51:18

Although it is late autumn, there are still many babies who go to the hospital recently because of sweating, and they are found to be zinc deficient when they are tested for trace elements.

Xu Haiqing, a child care department of Hubei Maternal and Child Health Hospital, explained that children's metabolism is vigorous and active, so they often sweat more than adults. Excessive sweating will < P > lead to excessive zinc loss and lead to zinc deficiency in the body. Zinc deficiency will reduce the immune ability of the body, especially the resistance of respiratory tract and digestive tract, and make the infection recur.

Dr. Xu reminds parents to add some foods rich in zinc to sweaty children. Generally, there is a lot of zinc in animal foods, such as oysters, lean meat and < P > dirty animals. Walnuts, chestnuts and peanuts also contain a lot of zinc and can be eaten regularly.

Some children sweat a lot, and they get soaked like water. The nose tip, forehead and hair are covered with sweat. Even in winter, they sweat profusely. When they open their clothes and hats,

water vapor evaporates.

Appropriate zinc supplementation for children with hyperhidrosis/Chen Hui (Deputy Chief Physician of Pediatrics, Beijing Haidian Hospital) 2111-11-17

Generally speaking, children have vigorous metabolism and are active, so they often sweat more than adults. In addition, children who are sickly and physically weak, suffering from rickets or tuberculosis < P > will also sweat.

Many trace elements in human body are excreted through sweat, and zinc is one of them. Zinc is an essential trace element for human body, which is closely related to children's growth and development, immune function, visual and sexual development. In the process of children's growth and development, the demand for zinc is relatively large, and excessive sweating will lead to excessive zinc loss. The incidence of zinc deficiency in children with hyperhidrosis < P > is significantly higher than that in normal children. Zinc deficiency will reduce the immune level of the body, especially the resistance of respiratory tract and digestive tract, and make the infection < P > recur, which in turn will cause children's physical weakness and aggravate hyperhidrosis, thus forming a vicious circle. Therefore, children with hyperhidrosis should be properly supplemented with zinc.

For children under 11 years old, the World Health Organization recommends that they should consume 11 mg of zinc every day. Children are on a normal diet and not.