Best of Nature Epsom Mineral Bath Salt contains magnesium sulfate, a mineral vital to our physical well being. Soaking in an Epsom Salt bath is a safe, easy way to increase the body’s natural levels of magnesium sulfate, reduce stress, flush toxins, decrease inflammation and provide soothing relief to sore muscles. Magnesium Sulfate acts as a pain reliever, allowing muscles to relax, and sulfate lessens the physical discomfort of aches and injuries.