The pH scale ranges from 0 to 14.
We get a value on this scale when we measure the pH of a solution - in this case urine or saliva.
The point of measuring pH is to find out how acidic or alkaline (basic) that solution is.
The value of "7" is considered neutral, neither acidic nor alkaline.
Values less than 7 are acidic, while values above 7 are considered alkaline.
It is important to note that this scale is logarithmic - which is the same way earthquakes are categorized.
If an earthquake measures 8.0 on the Richter magnitude scale, it is 10 times stronger than one measuring 7.0 and 100 times stronger that one measuring 6.0.
So if your saliva pH is 5.0, then your saliva is 100 times more acidic than neutral. A value of 6.0 would be 10 times more acidic than neutral. A value of 5.5 would be 50 times more acidic than neutral.
Most pH strips that test body pH have a smaller range than 0-14, since our urine pH and saliva pH never go to the outer ranges of the scale. Good pH test strips to buy would have a range around 4.5 to 9.0, with 0.25 or 0.50 increment steps.
Hopefully this refreshes your memory about pH.