Seven things to open the door: "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, "Is it that Wen Shao forgets the taste, and you will eat without salt in March?"
if you don't put some salt in your dishes when you eat, even 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. It regulates the balanced distribution of water in human body, maintains the osmotic pressure inside and outside cells, participates in the formation of gastric acid, promotes the secretion of digestive juice and can 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 can't do without salt. Eating too little salt will also lead to low sodium content in the body, loss of appetite, weakness of limbs and dizziness. In severe cases, anorexia, nausea, vomiting, accelerated heart rate, weak pulse, muscle spasm, blurred vision, weakened reflex and other symptoms may even lead to death.
In ancient times, the Netherlands, Sweden and other countries stipulated that people who broke the criminal law were not allowed to eat salt for a period of time as punishment.
However, eating more salt is also harmful to the human body. The results of scientists' research show that salt can "hydrate" the human body, that is to say, salt has a certain adsorption force on water, and more salt in the human body requires a corresponding increase in water, thus causing excessive water to stay in the body, thus causing high blood pressure.