"Magnesium oxide" refers to a chemical compound made up of the elements magnesium and oxygen. It is commonly used in medicine as a supplement to treat deficiencies, and also in industrial processes like making cement. Full definition
If you're going # 2 less than once a day, small doses of magnesium oxide throughout the day will boost your magnesium while keeping your digestion moving. (blog.bulletproof.com)
Contains 12 percent magnesium only, but it has a better absorption rate compare to other magnesium supplements, such as magnesium oxide. (articles.mercola.com)
And there are bad forms like magnesium oxide and sulfate. (bodyunburdened.com)