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Saliva, also called saliva, is the secretion secreted from the salivary glands into the mouth. Salivary glands are divided into two major types, large salivary glands and small salivary glands. The large salivary gland is called the salivary gland or salivary gland. The largest anatomical salivary gland is ① parotid gland, middle sized submandibular gland, and smallest submandibular gland. Small salivary glands are called small salivary glands and are distributed in about 600 places including lips, tongue, palate, ball, and mucous membranes, and are so small that they can not be seen by the naked eye. The acupuncture ingredients are more than 99% water and less than 1% ingredients include various electrolytes and proteins that are very important for oral health, various enzymes, various kinds of immunoglobulins, antimicrobial substances, , Very small amounts of albumin, several kinds of polypeptides and oligopeptides. The amount of saliva produced by healthy adults is about 1 to 1 per day.