About:Magnesium Oil is so named because of it's slick feel, and not because it is a true oil. This is a highly concentrated transdermal Magnesium spray that can be quickly and more readily absorbed in to the skin cells than the magnesium sulfate found in bath salts. According to WebMD, Magnesium is an electrolyte required for proper muscle and nerve function. A deficiency in Magnesium is a common cause for; headaches, muscle tics, anxiety, weakness, irritability, slow muscle recovery, and even digestive concerns like diarrhea and nausea. Spray directly on to areas exhibiting muscle or nerve pain for symptomatic treatment or use regularly with massage for prevention.