By: Dr. Masoud Esfahani Why is Magnesium Important? Often times, we see advertisements about vitamins and minerals such as vitamin  C, D, A and the most popular mineral- Iron. Like these substances, Magnesium has the same level of importance, in fact, we need about 310 to as much as 420 mg daily, depending on age and gender, to maintain our health. Magnesium is a mineral that has a vital role in our body. It is needed for hundreds of biochemical reactions. The following are just some of the roles and benefits of Magnesium: