salt WATER bath....

the theory here is twofold....  

IF....  you can absorb nutrients through the skin....  then....  you will absorb all kinds of minerals through a salt water bath....  or....  a swim in the ocean....  but....  many of us....  do NOT leave near an ocean....

and....

IF....  we co-evolved with the planet....  then....  the ocean contains the perfect types and combination of minerals for our bodies....