Magnesium is a vital mineral that is used in many biological processes. For example, it is a cofactor in more than 300 enzyme systems! It is also one of the most common minerals that people are deficient in so it is important to take a good Magnesium supplement. This however, is not the easiest thing to find, as Magnesium supplements are plagued by bad absorption and there are a few different factors that cause this, the main one appearing to be its physical properties. Most of the Magnesium that we ingest is absorbed in our small intestines through small spaces ed tight junctions. Absorption through tight junctions is dependent largely on the size of the compound, its solubility and its pH. These three issues all make it very hard for Magnesium to be absorbed.