1, the harm of eating too much salt
1. Eating too much salt can cause cancer.
Excessive salt intake will increase the risk of hypertension, myocardial infarction and cancer. Medical experts suggest that the daily salt intake per person in cities should be reduced from about 20g to10g or even below 5g, so as to reduce the incidence of some diseases. According to experts, nearly 50% of middle-aged and elderly people's daily salt intake exceeds the critical value of 6 grams proposed by the World Health Organization.
Second, eating too much salt is easy to edema.
Chinese medicine believes that body edema is a phenomenon that excess water in the body is accumulated without being discharged from the body. Some people try to lose weight by sweating or diuresis, but in fact they only temporarily eliminate edema, so it is difficult to lose fat fundamentally. If you want to lose weight, you'd better control your diet, increase physical exercise and eat less salt.
Third, sudden sleep death.
In recent years, sudden sleep death is rampant in Southeast Asian countries such as Thailand and the Philippines. In the past 16 years, * * * claimed more than 5000 lives. Some experts suspect that this disease may be related to salty eating habits. In the 1950s, it was found that more than 50% of people who died of this disease suffered from acute pancreatitis, which may be caused by the salty taste of Filipino food. However, he said that experts have failed to establish a causal relationship at present.
Fourth, eating too much salt will hurt the kidneys.
Eating too much salt can easily lead to an increase in blood volume and pressure on the wall of blood vessels, leading to an increase in blood pressure and arteriosclerosis. In addition, eating too much salt will make people feel thirsty and need to drink a lot of water to relieve it. Long-term intake of salt will lead to edema and increase the burden on the kidneys.
Fifth, eating too much salt is easy to grow spots.
Studies have confirmed that eating too much salt is more likely to cause freckles on the skin, which may not only make the face black and yellow, but also cause freckles on the cheeks. If you ingest animal fat and protein at the same time, it will affect the normal metabolism of the liver and make freckles more conspicuous.
2. Precautions for eating salt
1. Does salt have a shelf life?
When many families buy or use edible salt, most of them do not pay attention to the production date of edible salt, nor do they care about the shelf life of edible salt. They often buy a lot of edible salt, as if they were holding a big promotion. After a long time, the salty taste has not changed, and it is considered that edible salt can still be used normally.
The main chemical component of salt is sodium chloride, which is the main source of salty taste. The chemical properties of sodium chloride are very stable, so it is impossible to change the salty taste no matter how long it is stored. But salty doesn't mean it hasn't gone bad. Because salt contains not only sodium chloride, but also potassium iodide. Although the properties of potassium iodide are relatively stable, the iodine in potassium iodide will volatilize under long-term light, wind and heat conditions, which will reduce the iodine content in table salt and affect the effect of iodine supplementation. Therefore, salt has a shelf life, and the storage time should not be too long, preferably three years.
Step 2 add salt and stir fry
Iodine in iodized salt is added in the form of compound potassium iodate, and the properties of potassium iodate are relatively stable. However, in the cooking process, potassium iodide will decompose into iodine and volatilize when it meets high temperature. If you put salt into the pot as soon as the oil is hot when cooking, iodine will evaporate because of the high temperature. Therefore, when cooking, try to add salt when the dish is about to go out of the pot to ensure less iodine volatilization.
3. Put the salt in an open container.
Many families are used to putting salt in a convenient place when cooking, and will not seal the salt container. In fact, this can easily lead to the deterioration of edible salt.
Iodized salt should be stored in a covered, light-tight and sealed container, and away from the stove to avoid high temperature. It is best to put it in a cool and dry place to avoid direct sunlight or moisture absorption.
4. There is little difference between iodized salt and non-iodized salt.
Some people, especially the elderly in rural areas, don't understand the significance of iodized salt, and think that eating salt means eating its salty taste, which has nothing to do with iodine. There is little difference between eating iodized salt and not eating iodized salt, which is very harmful, because if you are an iodine deficiency patient, not eating iodized salt will aggravate your condition, and if you are a hyperthyroidism patient, eating iodized salt will also aggravate your condition, while ordinary people will get sick if they don't eat iodized salt for a long time.
The less salt you eat, the better.
Eating too much or too little salt is harmful. As we all know, high-salt diet has the following hazards: First, it can cause high blood pressure and significantly increase the incidence of stroke. The second is to damage the gastric mucosa, leading to stomach diseases such as gastric ulcer and gastritis. The third is to aggravate respiratory diseases and cause asthma.
But many people don't know that in fact, too little salt intake will also cause some harm to people's health.
Too little salt can cause headache, burnout, nausea, vomiting, loss of appetite, general weakness and other symptoms. Medical experts tell us that healthy adults can meet the body's demand for sodium by taking 6 grams of salt every day.
6. Sea salt contains less sodium than salt.
According to an expert survey, 6 1% people think that sea salt contains less sodium than salt. In fact, the sodium content of sea salt and salt is the same, both of which are 40%. Experts say that although sea salt is rich in trace elements such as magnesium, potassium and calcium, these nutrients can also be obtained through other foods.
7, cooking without salt, sodium does not exceed the standard.
Experts found that more than 75% of sodium in daily diet comes from processed food. Then the ready-made soup buns, salad dressing, canned or bottled food in the supermarket all contain a lot of sodium. Moreover, the "low sodium" on the food label is defined as "no more than 140 mg". Blood pressure is normal, and salt should be eaten in moderation.
8, blood pressure is normal, don't worry about eating salt.
In fact, hypertension is just a complication of salty food. Eating too much salt will lead to too much sodium intake, and it will also lead to obesity, diabetes and heart disease in the elderly. Even for people with normal blood pressure, the daily sodium intake should be controlled at 1500mg.
9, long-term high salt is easy to osteoporosis.
People who eat a high-salt diet for a long time are more likely to suffer from diseases such as kidney calculi and osteoporosis, but the reasons have not been understood for a long time. Recently, researchers found through animal experiments and cell experiments that it may be caused by sodium ion metabolism.
Iodized salt is the most common edible salt in daily life, but there are many kinds of edible salt. In addition to crude salt and refined salt, there are also special salts with various trace elements or nutrients and flavor substances added on the basis of refined salt.