OsiMagnesium magnesium oil spray with OptiMSM. Magnesium oil is a liquid form of magnesium chloride from the Zechstein spring, dissolved in water. By spraying magnesium oil on the skin, the magnesium is quickly absorbed through the skin. Also contains OptiMSM, a natural source of organic sulfur. Contains Zechstein magnesium and OptiMSM Suitable for external use Magnesium plays a role in maintaining strong and flexible muscles 100% natural and vegan Contents: 100 ml How to use? Suitable for daily use. Spray onto the skin and massage in slowly. Let the oil soak in for at least 20 minutes. Rinse off if desired. 2.5 ml (half a teaspoon) contains 257 mg magnesium and 312 mg OptiMSM.