Our magnesium oil spray is sourced from the ancient Zechstein seabed. It is extracted using sustainable technology from an underground layer of salt located approximately 1600 meters below the surface. Zechstein Sea existed during the Permian era aproximately 250 million years ago and is believed to be the most pure source of magnesium and other trace minerals. Easily absorbed spray to assist in Muscle and joint pain Relief from cramping Reduction of stress and anxiety Promote Restful sleep 8 sprays delivers approximately 100mg elemental magnesium