Extended data:
Salt refers to sea salt, well salt, mineral salt, lake salt and earth salt from different sources. Their main component is sodium chloride, and the state stipulates that the sodium chloride content of well salt and mineral salt shall not be less than 95%. Salt contains barium salt, chloride, magnesium, lead, arsenic, zinc, sulfate and other impurities. We stipulate that the content of barium should not exceed 20 mg/kg. Too much magnesium and calcium in salt will make the salt bitter, and too high fluorine content will also cause poisoning.
In recent years, many experiments have confirmed that there is a certain relationship between salt intake and the incidence of hypertension. Excessive salt intake in the diet can cause high blood pressure. The World Health Organization (WHO) recommends that everyone who consumes less than 5 grams of salt a day can prevent coronary heart disease and hypertension. In China, adults are required to consume 6 grams of salt every day to meet the body's need for sodium.
Reference link: Salt-Baidu Encyclopedia