Puhdas+ Magnesium Roll-on is a strong magnesium product for external use. Use magnesium roll-on for magnesium deficiencies, eg. muscle cramps, growth pains, cramps and restless legs. Along with magnesium it contains glucosamin of plant origin and arnica extract. Glucosamin is component of joints and arnica extract reduces inflammation effectively. The product soothes muscle and joint pain immediately and eases swelling caused by strains, sprains and repetitive strain injuries. Puhdas+ Magnesium sport Roll-On also expedites muscle recovery after physical stress. Usage Use the roll-on directly to the problem area. It\'s easy to apply on back and neck. Product is easy to use with out staining hands. At the beginning of the use, magnesium can cause mild tingling and slight redness on sensitive skin, which usually stops when continuing use. Avoid contact with eyes and mucosa. Shake before using.