Epsom salt USP grade is a white/transparent crystal that has various uses. It is mainly used as a soaking solution to help relieve pain caused by soreness, muscle aches, sprains, bruises. However, it can also be used as a nutrient source through fermentation, used in hair wave neutralizer solutions and hair densifier products, and in the brewery, high fructose, antibiotic, high fructose corn and cheese production.