“…Generally, there is little evidence that differences in diet can exert systemic effects on salivary flow rate and composition. However, a regular diet that requires considerable mastication or a rigid chewing gum regimen in addition to a normal diet has been shown to increase parotid salivary flow rate (Johnson and Sreebny, 1982; DeMuniz et al , 1983; Dodds and Johnson, 1993). The masticatory process seems to be crucial for GI absorption of a number of essential foods like meat and vegetables, but not to others such as bread, cheese, rice, fish, and egg (Farrell, 1956).…”