The digestive system comprises two primary components: the digestive tract and the digestive glands. The digestive system is composed of the mouth, pharynx, esophagus, stomach, small intestine, and large intestine. Digestive glands can be categorized into two types: major and minor. The salivary glands, liver, and pancreas serve as the primary digestive glands, while additional minor glands are located throughout the walls of the digestive system. Nitrates have demonstrated protective benefits for the stomach, small intestine, colon, pancreas, liver, and salivary glands. Research is currently being conducted on nitrate’s physiological protective role and mechanisms in various digestive organs.