EPSOM SALTS

Epsom salt is one of many naturally occurring mineral salts, a compound of magnesium and sulfate. It is completely different from table salt, with a bitter taste
In water, they break down into magnesium and sulfate. The theory is that when you soak in an Epsom salts bath, these get into your body through your skin. That hasn't been proven, but just soaking in warm water can help relax muscles and loosen stiff joints.