Magnesium Oil w/D3 is an extremely concentrated spray of pure magnesium chloride minded deeply under the earths surface from the Zechstein Seabed in the Netherlands with added Vitamin D3 (as Cholecalciferol). Its the perfect combination--the way nature intended. It is non-greasy, easy to apply, and can be used daily. DIRECTIONS: Spray 4 to 5 times onto skin and massage into skin. After a while you may see a slight white residue forming on the areas where you have applied the spray. It is just the salt that has stayed behind and can certainly be wiped or washed off.