In StarFish - The Evolution of People at Work the main character Jax uses Himalayan Sea Salt to revitalize his feet.  In this video, author Jeff Thayer explains how to use it and more importantly why the haloarchaea, a primordial single cell life form which has inhabited this planet for billions of years plays a major role in the human body.  Scientists now estimate there are about 100 trillions cells in the human body, but only 10% are you with your DNA.  The rest are bacteria, yeast, and archaea.  When the sea salt dissolves in a foot bath, they become available for absorption through the feet.  For people who work on their feet all day, it's a great way to revitalize them.