It has been shown that the prevalence increases with age and that xerostomia is
more prevalent in postmenopausal women compared to men [16,30]. It is estimated
that about 30% of the population older than 65 suffer from xerostomia [29]. Although
previous opinion that salivary function declines with aging process, it is now
accepted that salivary flow as well as salivary constituens are both age-stable in the absence of major medical problems and medications. Therefore, increasing age does
not by itself cause hyposalivation