They might show up as slightly acidic or slightly alkaline because of this. The pH scale measures how strongly acidic or alkaline a solution is using a set of values from pH 0 to pH 14.

To understand the alkaline diet, you need to know a bit about acidity. The pH scale measures how acidic or alkaline a substance is, measured on a scale from 0 to 14, in which 0 is the most acidic.