There are six main glands (three on each side of the mouth) that are constantly producing saliva. The parotid glands secrete saliva into the mouth just above the upper molars. The submandibular glands and sublingual glands also release saliva near the lower molars and under the tongue, respectively.
Saliva makes eating and speaking easier, as it keeps the mouth moist. Another key aspect is its ability to cleanse the teeth of harmful bacteria and lower the acidity level in the mouth, aiding in the prevention of tooth decay and gum disease. In addition, it also contains minerals such as calcium, phosphorus, and fluoride, which have restoring properties for tooth enamel.