Magnesium is said to be more bioavailable applied topically than taking a supplement by mouth. An essential nutrient, Medical News Today says, Magnesium is an important mineral, playing a role in over 300 enzyme reactions in the human body. Its many functions include helping with muscle and nerve function, regulating blood pressure, and supporting the immune system”. This particular product is pure, extra-strength Magnesium "oil" made with the highest quality Magnesium, distilled water, and essential oil. Please read and follow directions on how to apply. Other Info: Organic, Non-GMO, Completely cruelty-free, No sulfates, phthalates or parabens…ever. No synthetic dyes or fragrances. Labels printed on recycled paper from eco-friendly soy-based inks. Completely all-natural and safe.