Magnesium is traditionally accepted as an essential mineral, crucial for proper muscle function. Similar to epsom salts, research suggests that transdermal absorption of magnesium can provide therapeutic benefits for symptoms such as chronic muscle aches, cramping or stiffness. This recipe combines Sweet Birch with Magnesium bath flakes to re-invigorate sore muscles and stiff joints. An essential daily soak for yogis and athletes. Contains 11 oz.