Magnesium is in every single organ in the body and it is a vital mineral for ongoing health and wellbeing - physically, mentally and emotionally. More than half of the population of the western world is deficient in magnesium, and that means they will also be deficient in other nutrients, such as calcium – as magnesium is essential for calcium uptake. Basically, you need magnesium in your body if you want it to function correctly and healthily, and to age well, and if you want to prevent disease, illness and immobility in later life.