Ancient Minerals magnesium oil contains only the purest ingredients in a convenient topical spray. This pure, concentrated transdermal magnesium mineral supplement is formulated for rapidly restoring cellular magnesium levels through the skin. It contains only raw, ultra-pure magnesium chloride and other trace minerals, with a single teaspoon containing approximately 560 mg of elemental magnesium. Magnesium oil is a transdermal magnesium supplement, designed to deliver magnesium through the skin, bypassing the gastrointestinal tract for convenient, rapid absorption into the cells.