Zechsal magnesium oil is the most concentrated liquid form of magnesium dissolved in water. It’s called magnesium oil because it has smooth, oil-like consistency. It is easily absorbed by the skin, ensuring distribution of the magnesium ions in the area applied, as well as throughout the entire body. The best product to replenish a magnesium deficiency. Relief from aching muscles and joints. Relief from insomnia. More energy, counters fatigue. For strong bones, better calcium absorption. Relief from headaches and migraines.