1. From a physiological point of view, salt is of great significance for maintaining human health: salt can help people digest food. The salty taste of salt can enhance people's taste and increase oral saliva secretion.
2. Thereby stimulating appetite and improving food digestibility. Salt can participate in body fluid metabolism. Salt is an important component of body fluids. People who work in high temperature sweat too much and need to supplement their drinks. People with excessive vomiting and diarrhea should be given normal saline; People with excessive blood loss should also drink warm salt water urgently, because salt can maintain the osmotic pressure and acid-base balance of the human body.
Related to salt:
Salt is not only an indispensable condiment in people's diet, but also an indispensable substance for human body. Its main component is sodium chloride, which is a neutral inorganic salt. It is salty in taste and cold in nature, and enters the stomach, kidney and large intestine. Has the effects of clearing away heat and toxic materials, cooling blood, moistening dryness, invigorating kidney, relaxing bowels, killing parasites, diminishing inflammation, inducing vomiting and stopping diarrhea.
"Shennong Materia Medica" records: "Salt is applied to beriberi, cleaning and strengthening teeth, and treating various skin diseases." Washing feet with salt and perilla root soup can cure beriberi. Scrubbing the skin with salt water can make the skin healthy and enhance resistance. Salt has an analgesic effect. If hot water burns your skin, rubbing some salt (or soy sauce) can relieve the pain. Drinking light salt water in hot weather can prevent constipation, sore throat, toothache and abdominal pain. Drinking a cup of salty boiled water every morning can avoid losing your voice If you eat toxic food by mistake, drink some salt and boiled water to detoxify. Milk goes bad easily in summer and autumn. Less salt in milk can prolong the shelf life of milk. Before eating vegetables and fruits, soak them in light salt water for 20 minutes to remove residual pesticides and parasite eggs and kill germs. Wash the fish in salt water before frying, and the fish will have no dirt and smell. In addition, salt can also soften acid lumps in the body.
In the past, it was foolish to think that salt was a necessary food for human survival. Modern science gave us a loud slap in the face. Salt is one of the killers affecting human health. Excessive salt can cause many diseases. In China, people generally eat too much salt. According to the national nutrition survey, the salt consumption from south to north ranges from 12g to 15g. According to the regulations of the World Health Organization 6g, we have more than doubled. Moreover, eating too much salt has a direct impact on health, so we must control the amount of salt, give priority to light and eat scientifically.
Disadvantages of too much salt:
1. Too much salt can lead to hypertension.
According to experts' investigation, there is a certain relationship between salt intake and the incidence of hypertension. The more salt you eat, the higher the incidence of hypertension. Eskimos in Alaska have very low salt content and basically have no hypertension, while residents in northern Japan who have a daily salt content of about 20 grams have a surprisingly high incidence of hypertension. In Guangdong province, where the salt content is low in China, the incidence of hypertension is only 3.5%; However, northerners who like salty food have a significant increase in the incidence of hypertension. This is because under the action of some endocrine hormones, salt can increase the sensitivity of blood vessels to various antihypertensive substances, cause arteriolar spasm, raise blood pressure, and may also accelerate the hardening process of renal arterioles. At the same time, salt also absorbs water. If the salt accumulates too much, the water content will increase greatly and the blood volume will increase accordingly. In addition, the imbalance of potassium and sodium inside and outside the cell will damage the function of red blood cells, and the blood flow will be viscous and slow, which will increase the workload of blood circulation and lead to further increase of blood pressure.
2. Too much salt can cause edema.
Because there is too much salt, sodium accumulates in the body, and sodium is hydrophilic, which will cause edema and increase the burden on the kidneys.
Too much salt can cause a cold.
High concentration of sodium salt has strong osmotic effect, which will affect the disease resistance of human cells. Excessive salt, one is to reduce saliva secretion, so that lysozyme in the mouth is also reduced accordingly, so that the virus has the opportunity to implant in the mouth. Second, due to the infiltration of sodium salt, the defense function of epithelial cells was inhibited and the disease resistance was greatly lost. Cold virus can easily invade the human body through cells that have lost barrier function, so people are prone to catch a cold, and upper respiratory tract inflammation such as pharyngitis and tonsillitis often occurs. Excessive salt can lead to heart disease.
4. Too much salt will damage the heart.
There is such a record in Neijing: "More salt makes the pulse thick and discolored". "The taste is too salty, big ... >>
Question 2: What happens when people don't eat salt? If you don't put some salt in the dish when you eat, even the delicacies are like chewing wax. Salt is not only an important condiment, but also an indispensable substance to maintain the normal development of human body. Adjust the balanced distribution of water in human body, maintain osmotic pressure inside and outside cells, participate in the formation of gastric acid, promote the secretion of digestive juice, and stimulate appetite;
At the same time, it also ensures the pH necessary for the action of pepsin, maintains the balance of pH in the body and the normal circulation of body fluids. People cannot live without salt. Eating too little salt can also lead to low sodium content in the body, loss of appetite, weakness of limbs and dizziness. In severe cases, there will be anorexia, nausea, vomiting, increased heart rate, weak pulse, muscle spasm, blurred vision, weakened reflex and other symptoms.
Question 3: Can people not eat salt? No, salt, also known as edible salt, is one of the most important substances for human survival and the most commonly used seasoning in cooking. The content of sodium chloride (chemical formula NaCl), the main chemical component of salt, is 99%. Potassium chloride is added to the salt produced in some areas to reduce the content of sodium chloride and the incidence of hypertension. At the same time, iodine is added to salt in most parts of the world to prevent iodine deficiency. Iodized salt is called iodized salt.
1. Maintain osmotic pressure of extracellular fluid.
Na and Cl are the main ions to maintain the osmotic pressure of extracellular fluid. K and HPO4 are the main ions to maintain the osmotic pressure of intracellular fluid body. In the total cation of extracellular fluid, Na accounts for more than 90%, and in the total anion, Cl accounts for about 70%. Therefore, salt plays an important role in maintaining osmotic pressure and affects the movement of water in human body.
2. Participate in the regulation of acid-base balance in the body.
Sodium bicarbonate formed by Na and HCO3 has buffering effect in blood. Cl and HCO _ 3 also have a balance between plasma and red blood cells. When HCO 3 permeates from red blood cells, the anions in red blood cells decrease, and Cl enters red blood cells to maintain the electric balance. or vice versa, Dallas to the auditorium
3. Chloride ion participates in the generation of gastric acid in vivo.
The gastric juice is strongly acidic, and the pH value is about 0.9 ~ 1.5. Its main components are pepsin, hydrochloric acid and mucus. The parietal cells of the gastric gland can secrete hydrochloric acid. Parietal cells transfuse bicarbonate into blood and secrete hydrogen into gastric juice. At this time, Cl enters the gastric juice from the blood through parietal cells, maintaining the electric balance. Why can't such strong hydrochloric acid erode the stomach wall in the stomach? Because there is a kind of mucus cell in the gland of the stomach, the secreted mucus forms a layer of mucus about 1 mm ~ 1.5 mm thick on the surface of the gastric mucosa, which is usually called the barrier of the gastric mucosa. Under the attack of acid, the gastric mucosa will not be digested by digestive enzymes and form ulcers. However, drinking alcohol will weaken the barrier function of gastric mucosa and often increase the possibility of causing gastric ulcer.
In addition, salt can also maintain the normal excitability of nerves and muscles. When a large amount of extracellular fluid is lost (such as massive bleeding and sweating) or food is short of salt, the content of sodium ions in the body decreases, and potassium ions enter the blood from cells, which will lead to blood thickening, less urine and yellow skin. The human body's demand for salt is generally 3 to 5 grams per person per day. Due to different living habits and tastes, the actual intake of salt varies from person to person. China people eat about 10 g ~ 15 g of salt every day.
Question 4: What happens if you don't eat salt for a day? Although salt is necessary for the human body, there is nothing wrong with not eating it for a day, except that it tastes different and will not affect the body.
Question 5: How can people open the door if they don't eat salt for a month? Seven things: "rice, oil, salt, sauce and vinegar tea", which shows that salt is a necessity for people. Su Shi, a great writer in the Song Dynasty, wrote in his poem: "Don't you forget the taste? You can eat without salt in March?" If you don't put some salt in the dish when you eat, even the delicacies are like chewing wax. Salt is not only an important condiment, but also an indispensable substance to maintain the normal development of human body. Adjust the balanced distribution of water in human body, maintain osmotic pressure inside and outside cells, participate in the formation of gastric acid, promote the secretion of digestive juice, and stimulate appetite; At the same time, it also ensures the pH necessary for the action of pepsin, maintains the balance of pH in the body and the normal circulation of body fluids. People cannot live without salt. Eating too little salt can also lead to low sodium content in the body, loss of appetite, weakness of limbs and dizziness. In severe cases, there will be anorexia, nausea, vomiting, increased heart rate, weak pulse, muscle spasm, blurred vision, weakened reflex and other symptoms. In ancient times, the Netherlands, Sweden and other countries stipulated that people who violated the criminal law were not allowed to eat salt as punishment for a period of time.
However, eating too much salt is also harmful to the human body. The results of scientists' research show that salt can "replenish water" to the human body, that is to say, salt has a certain adsorption force on water. If there is more salt in the human body, it is necessary to increase the water accordingly, so that too much water stays in the body, thus causing high blood pressure. Someone has investigated the eating habits of residents in northern Tokyo, Japan. They eat an average of 25 grams of salt every day, and people with hypertension account for 30 ~ 40% of all residents. In other parts of the world, people only eat 5 ~ 15g of salt every day, and only 8 ~ 10% of them suffer from hypertension. Eskimos living in the Arctic Circle eat less than 5 grams of salt every day, and almost no one suffers from high blood pressure. Therefore, experts suggest that adults should not eat more than12g of salt every day.
Question 6: What will happen to salt if people don't eat oil for a long time? You don't have to eat oil and salt to see stones.
Question 7: What happens if people don't eat salt? What are the consequences? Sodium ion in salt is an essential substance for the nervous system to transmit information. Both muscle contraction and heart beating are related to sodium ions. Therefore, if the human body is short of salt, the nervous system will be weak and people will be weak.
Salt is not only an important condiment, but also an indispensable substance to maintain the normal development of human body. Adjust the balanced distribution of water in human body, participate in the formation of gastric acid, promote the secretion of digestive juice, and stimulate appetite; At the same time, it also ensures the pH necessary for the action of pepsin, maintains the balance of pH in the body and the normal circulation of body fluids.
Eating too little salt can also lead to low sodium content in the body, loss of appetite, weakness of limbs, dizziness and other phenomena; In severe cases, there will be symptoms such as anorexia, nausea, vomiting, muscle spasm, blurred vision and weakened reflex.
Low salt content in the body may even lead to the germination of cancer. Salt deficiency is one of the causes of osteoporosis. A certain amount of salt must be guaranteed in the blood. If there is not enough salt, it will be extracted from the bones. Feeling muscle cramps at night is often a sign of salt deficiency.
Question 8: What happens if you don't eat salt for a long time? If you don't eat salt, the intake of sodium salt is insufficient, which will make the osmotic pressure inside and outside the cell unbalanced, promote water to enter the cell, and thus produce different degrees of brain edema. Light people will have consciousness disorders, including drowsiness, fatigue and trance, and severe people may have coma; If the intake of salt is excessively restricted for a long time and the serum sodium content is too low, it will cause neurological and mental symptoms, such as loss of appetite, weakness of limbs and dizziness. In severe cases, there will be symptoms such as anorexia, nausea, vomiting, increased heart rate, weak pulse, muscle spasm, blurred vision, weakened tendon reflex, etc., which is medically called hyponatremia syndrome; Acute salt restriction can reduce body fluid volume, increase the activity of renin-angiotensin system and sympathetic nervous system, and may lead to the increase of blood pressure in some patients. Of course, you can't eat salt if you are in a pathological state, such as hypernatremia. Eating more salt and limiting it excessively are harmful to your health.
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