Original Zechstein magnesium oil in a spray bottle Magnesium oil is a novel, innovative magnesium preparation. It is applied externally and sprayed directly onto the skin. The Magnesium Oil Vital Spray is a natural, pure Zechstein magnesium chloride solution for applying magnesium to the skin. It has a wide range of uses and is applied externally for massage, regeneration, and skincare. Magnesium oil is so named because its consistency is reminiscent of a soft, nourishing oil. However, it is not an oil and does not cause oily stains. Application: Apply 5-20 sprays daily to arms, legs and/or stomach and massage in gently. Leave on for at least 15-20 minutes, then rinse off if necessary. Stressed muscles can be massaged directly with the Magnesium Oil Vital Spray. Its also ideal before and after exercise to loosen strained muscles.