I don't know if epsom salt is good for eating wise, but I do know that it's good for sore muscles if you put some in your bath water, and it's also really good for drawing out infections, especially toe infections.
Epsom salt is used for medicinal purposes and not for cooking. Added to a bath it can soothe sore muscles, help with swelling, draw out splinters, deodorize feet, and soften rough skin. It is also thought that epsom salts in your bath can also help draw toxins out of your body.
Epsom salt is actually used more for medicinal purposes than for cooking. You can add it to a bath to help relieve tension and general aches and pains. You can even mix it with dried herbs (like lavender) to create a relaxing and soothing bath time. It's actually the main ingredient in most bath salts.