Magnesium oil is a aqueous solution of magnesium chloride, often called magnesium oil due to its oily feel when in fact it contains no oil at all. It is one of the best ways to obtain very high levels of magnesium directly through the skin bypassing internal organs. This is the strongest version we can make. It is very cloudy like milk. As it is such a high percentage a solid mass may form on the bottom. Shake prior to application, beware that it will produce very strong tingling sensations on the skin. You must continue to rub until the oily feel goes away. Our magnesium oil utilizes a natural source of magnesium chloride - nagari flakes purified from sea water with trace minerals. It is a cloudy 71% concentration. Magnesium oil when applied transdermally has shown to provide superior magnesium absorption when compared to oral forms.