Magnesium is a vital mineral that plays an important part in the metabolism process. It also supports a range of functions from reducing tiredness to the health of your bones and teeth. Comes in a great value 6 month supply. Features of Nutri Within magnesium 200mg 180 capsules 6 month\'s supply Contributes to electrolyte balance Contributes to normal energy-yielding metabolism Contributes to the normal function of the nervous system Contributes to the normal psychological function Contributes to normal muscle function Contributes to normal protein synthesis Contributes to maintenance of normal bones and teeth