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 What is the pH of saliva before and after eating food??

Hi,
 
The pH of saliva before eating anything is slightly alkaline with pH = 7.4
After eating, the pH of saliva completely depends upon the food stuff eaten. If we have eaten something acidic (like citrus fruits, curd,etc), it will be acidic and if we have eaten something basic(like mint), it will be basic.
 
Again after eating, when some of the food particles are left behind, the bacteria in our mouth decompose it into acid and thus making the saliva medium acidic.
 
 
Hope it helps.
Cheers!

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View Full Answer

 Generally, the pH of saliva is 7.4, which is equal to the pH of blood that is 7.4, & pH of spinal fluid that is also 7.4.
The pH of saliva is almost constant but it varies depending on the measurement and various Investigators determine the pH of saliva in range of pH 5.0 to pH 8.0
This varies depending on the type of meal, if you have taken acidic meal then pH is slightly low, if you have taken alkaline meal then pH is slightly high.
Therefore, it is advisable to wash your mouth before the measurement of pH of saliva.

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