Caryl Wattman wrote:

>Hate to keep asking so many questions, but where does one order mineral salt?

Adding salt is not Paleolithic, and all of these questions are off-topic to
this list.

Dietary sodium levels were extremely low in the past compared to modern
diets and hence renal calcium excretion, despite high phosphorous intake,
was still less than that for moderns. Some references can be found here:

  http://maelstrom.stjohns.edu/CGI/wa.exe?A2=ind9706&L=paleodiet&O=T&P=2282

Don.