Magnesium works to kill odour causing microbes and bacteria on the surface of the skin. When used in deodorant, it slowly raises the natural pH in our armpits when we sweat to halt new bacteria growth. Due to the slow change in pH, magnesium is non irritating, especially compared to baking soda. In hair care magnesium hydroxide is gentle yet effective at deodorizing and absorbing oil, leaving your hair with a refreshed and matte finish.