"Epsom salt, also known as magnesium sulfate, is a pure mineral compound. It has been traditionally used for a variety of purposes, including as a soaking agent to help soothe tired muscles. When dissolved in a warm bath, Epsom salt can help promote relaxation and ease occasional aches and pains. It is also used in gardening to support plant growth. This product is for external use only as a soaking agent and should not be ingested."