What can cause a reduction in saliva production?

Reduction in saliva production is commonly associated with age due to physiological changes that occur as one grows older. As individuals age, there is often a natural decline in the function of the salivary glands, leading to xerostomia or dry mouth. This diminished saliva production can result from various factors, including hormonal changes, medication side effects, and overall health status, which can negatively impact the amount and quality of saliva being produced.

In contrast, increasing hydration and consuming more water generally lead to enhanced saliva production because adequate fluid intake supports the body's ability to maintain proper moisture levels. Regular gum chewing can also stimulate salivary flow, as the act of chewing promotes saliva release. Therefore, while age can significantly impact salivary gland functionality, the other options actually support or stimulate saliva production rather than reduce it.