Epsom salt is a natural mineral found commonly in Epsom, Surrey, England; it is also known as magnesium sulphate. A chemical compound made up of magnesium, sulphur, and oxygen.
The most common use for Epsom salt is in baths, where it is simply dissolved in water and the magnesium ions are absorbed into the body. Magnesium is the fourth most abundant mineral in the body, the first being calcium. Magnesium is involved in more than 325 biochemical reactions that benefit your heart and nervous system.