Kneel and beg for an essay of 1000 words about salt and health! Kneel down! ! !

As the saying goes, "No salt makes no taste", and salt is an essential condiment in people's lives. Put some salt in the dish properly, which is both seasoning and beneficial to human health. The main function of salt is to regulate the osmotic balance between cells and blood and normal water and salt metabolism. When sweating, adding salt properly can prevent the lack of trace elements in the body. Under normal circumstances, it is easy to keep a balance between the total amount of water and salt consumed by the human body and the total amount of water and salt discharged. However, in some special cases, this balance may be destroyed and problems may arise. For example, when people suffer from acute gastroenteritis, the water they drink cannot be absorbed into the blood, but is discharged with feces, while the water in the body is still discharged from the body through breathing, sweat and urine, resulting in severe dehydration. At this time, in addition to drug treatment, patients should be injected with some normal saline to maintain the balance of water metabolism. For another example, in intense physical labor and high temperature operation, a lot of salt in the body is excreted with sweat. At this time, due to insufficient salt in the body, muscle spasm may occur. Therefore, when resting, drink some light salt water to maintain the balance of salt metabolism. "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. Salt has many benefits to people's health, but the food intake should be appropriate, per person per day 10g. If it is excessive, it will also bring harm to people. Too much salt can lead to high blood pressure. 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. 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. There is such a record in Neijing: "More salt makes the pulse thick and discolored". "The taste is too salty, which hurts the bones and depresses the heart." Too salty makes arterioles contract, which is harmful to the heart. For example, the death rate of heart disease among Hunan residents is four percentage points higher than that of the whole country, which is closely related to the large consumption of pork and salt. Too much salt can lead to gastric cancer. The places with the largest number of patients with gastric cancer in Japan are Akita Prefecture and Yamagata Prefecture in the northeast. Residents of Niigata Prefecture and Ishikawa Prefecture facing the Sea of Japan eat rice for every meal and suffer from stomach cancer. Akita Prefecture, which has the largest number of patients with gastric cancer, once launched a salt reduction campaign, and the number of people who died of gastric cancer decreased by more than 20%. It can be seen that eating too much salt is a major cause of cancer. There is no carcinogen in salt, but it is easy to destroy gastric mucosa and help carcinogens. In addition, kidney disease and stroke are also closely related to excessive salt. So don't eat salty food at ordinary times, especially for the elderly and infants. You can't give your child food according to the taste of adults, which will damage your child and induce hypertension and myocardial weakness. When cooking for the elderly, try to use spicy spices such as vinegar, chopped mustard and pepper instead of salt to reduce the amount of salt.