Ancient Minerals Magnesium Gel Ultra is a unique gelled formulation of our high purity ancient magnesium chloride and biologically active organic aloe vera extract in therapeutic amounts. This professional strength magnesium gel formulation incorporates OptiMSM® and was developed for sustained release of magnesium chloride and aloe vera polysaccharides by the skin. Ancient Minerals Magnesium Gel Ultra stays hydrated when applied, and is designed not to be fully absorbed.