Substance you n saliva that makes food slippery?

The substance in saliva that makes food slippery is called mucin. Mucin is a glycoprotein that is produced by the salivary glands and is responsible for the viscosity of saliva. It helps to lubricate the food as it is chewed and swallowed, making it easier to move through the esophagus and into the stomach. Mucin also helps to protect the mouth and throat from irritation caused by dry food and drink.