Saliva contains substances that can kill bacteria. Medical scientists have found that a considerable amount of drugs will be transferred to saliva through blood after oral administration or injection. Therefore, it is best not to vomit more when patients take drugs or inject drugs; When there is a lot of saliva, you should swallow it to avoid the loss of drugs and affect the curative effect.
The latest research by scientists shows that saliva can also detoxify some carcinogens in food, so some people even call saliva a "natural anticancer agent".
Effect of saliva on human health
First, hemostasis: saliva can promote blood coagulation, and saliva can help stop bleeding when oral trauma or tooth extraction causes bleeding.
The second is lubrication: saliva contains mucin, which can make the mouth smooth and soft.
The third is the washing function: it can wash away food residues and keep the mouth clean and hygienic.
The fourth is dilution: when acid, bitterness and other irritating things enter the mouth, saliva secretion increases, and it is easy to spit or swallow after being diluted.
Refer to the above? Baidu encyclopedia-saliva