Yes, lemon water can increase saliva production. The acidic nature of lemon juice acts as a stimulant, triggering the salivary glands to produce more saliva. This is supported by several sources.
How Lemon Water Stimulates Saliva Production
-
Acidity as a Stimulant: The high acidity of lemon juice is a key factor in increasing saliva flow. The body responds to this acidity by producing saliva to neutralize the pH balance in the mouth. This is mentioned in multiple sources, including North Canton Smiles which notes that lemon's acidic properties increase saliva production. The Dentists at Pymble website also highlights that lemon water increases salivation, which helps neutralize the acidic environment.
-
Practical Applications: Adding a few drops of lemon juice to water is a suggested method to stimulate saliva flow for those experiencing dry mouth, as noted in the University of Mississippi Medical Center handout and other sources. This is also supported by the suggestion to suck on lemon drops or use lemon wedges to increase saliva flow in the case of salivary gland stones, as seen in the Merck Manual Consumer Version.
-
Scientific Studies: While some studies focus on other acidic or sour substances, the principle remains consistent. A study in the Journal of Nuclear Medicine (https://jnm.snmjournals.org/content/46/2/261) examined lemon candy's effect, and while the results were specific to that context, it demonstrates the saliva-stimulating potential of sour, acidic substances. Another study (https://pubmed.ncbi.nlm.nih.gov/26767120/) comparing yogurt and lemon juice found that while yogurt increased saliva more significantly, lemon juice still had a measurable effect.
Important Note: While lemon water can increase saliva, excessive consumption may also erode tooth enamel due to its acidity.
