Composition and method for improving quantity of tear fluid, composition, treating constipation and improving skin quality

A method of treating a human in need of an increased quantity of tear fluid in their eye, the method consisting essentially of administering to the human in need thereof a therapeutically effective amount of an extract of the rhizome of Kaempferia parviflora to effectively treat the human in need of an increased quantity of tear fluid in their eye, wherein the extract consists essentially of 3,5,7,3′,4′-Pentamethoxyflavone, 5,7,4′-Trimethoxyflavone, 5,7-Dimethoxyflavone, 3,5, 7-Trimethoxyflavone, and 3,5,7,4′-trimethoxyflavone, and the total mass of them in the entire method is not less than 10 wt. % and not greater than 20 wt. %.