Yesterday, in a workshop I was teaching at Massanutten Resort, we had a discussion of the importance of salt and water in our diets. I promised those attending that I would post the name of a book on this subject, so here it is: Water&Salt The Essence of Life by Dr. Med. Barbara Hendel and Peter Ferreira. You will find the recipe for making Sole and its benefits starting on page 155. Hope this answers all your questions! If you need to purchase Pink Salt Chunks to make Sole, I do have some.
to order on Amazon
https://www.amazon.com/Water-Salt-Essence-Healing-Nature/dp/B001DVZMW6