Salt is usually considered as the "top of all tastes" because salt is essential in any food. The main component of salt is sodium chloride, which contains sodium ions needed by human body. The state also stipulates that the sodium chloride content of salt shall not be less than 95%. The reason why salt is called "the top of all tastes" is because it plays a very important role in life. Salt is not only a condiment, but also plays a very important role in life.