Stock up on Over-the-Counter medical grade Foster & Thrive Epsom salt. This 1-lb. pouch of Epsom salt can be used in various ways to benefit the body, such as alleviating symptoms of constipation, reducing headaches and easing tension in muscles. Made of pure magnesium sulfate, Epsom salt granules are safe as an oral saline laxative that draws water into the colon and produces a bowel movement in 30 minutes minimum. With an Epsom salt bath, salt can help to relax muscles in 15 minutes, relieving tension and pain in places like the shoulders and back. When dissolved in warm bath water, the user's skin can absorb magnesium for the body to receive benefits. Bath water with magnesium sulfate granules relieve tension by relaxing muscles in the face and neck. For emergency situations, you can apply Epsom salt combined with warm water as a wet dressing compress to relieve swelling and stiffness in joints.