Slobber moistens food and contains enzymes that helps digestion. Some are friendly bacteria to adhere to teeth and gums preventing inflections.
Saliva does interesting things. For elaboration,consult Professor Irwin Mandel of Columbia University.
Such Sino-American Economics of Health is worth investigating!
Francis Shieh a.k.a. Xie Shihao, an octogenarian student of health as human capital in economics to share some knowledge to readers on Thursday, October 8, 2009