Your question: The only thing that I have never understood about how alkaline/acid balance works is how acid chooses where in the body to build up.
Answer: Could it be that the Tissue and Organs of the body which are not getting the needed Alkaline Minerals Specific for their needs, may be where the Body becomes too Acidic first ?
Could this also be some of "WHY" I suggest for folks to use Kelp to help supply Specific Alkaline Minerals, which they may not be able to get from anywhere else ?
May "YOU" continue to be Blessed by your efforts to learn to help yourself !
And may you share with others in need , who are willing to listen !