Saliva is saliva secreted by salivary glands around the mouth. Has the functions of lubricating oral mucosa, dissolving food and promoting swallowing. It also contains amylase and lysozyme, which can help digestion and have bactericidal effect.

Saliva is called golden jade liquid in Chinese medicine. Su Wen's theory of meridian differentiation says: "If you drink in the stomach, you will overflow essence;" If you drink in the spleen, your temper will disperse essence; If you drink in the lungs, you will pass through the waterway, and then you will lose in the bladder meridian, and the five internal organs will be parallel. " This means that body fluids pass through the stomach, spleen and lungs and spread to all blood vessels in the whole body. Saliva contains natural anticancer factors. If people have some conditions that can promote the growth of cancer cells, saliva can threaten or even kill cancer cells. Therefore, Chinese medicine has attached great importance to saliva health care since ancient times, which is the reason. As the saying goes, "If you swallow 300 mouthfuls of saliva every day, you can live to be 99 years old." Saliva has such a function, as long as people make it according to law every day and persevere, they can always protect Kangmeili.