Do I need to shower or rinse the Magnesium off after using it?

Shower off the magnesium oil or magnesium gel after use is a matter of personal preference, and depends on how much, and where it is applied on the body. Most of the times, the more magnesium oil or gel used per application, the higher likelihood you may prefer to rinse it off. In about twenty minutes your skin can take full advantage of directly applied magnesium, and it may be safely removed at that point.