Magnesium in dietary supplements Magnesium is a vital mineral that plays a significant role in numerous bodily processes. While supplements can be beneficial, they are not a substitute for a balanced and varied diet or a healthy lifestyle. Magnesium helps reduce feelings of tiredness and fatigue, supports electrolyte balance, and contributes to normal energy metabolism. The positive effects of magnesium Magnesium contributes to normal muscle function. Magnesium contributes to the maintenance of normal bones and teeth. Magnesium contributes to the normal function of the nervous system. Magnesium contributes to the reduction of tiredness and fatigue. Magnesium contributes to normal energy metabolism. Magnesium plays a role in cell division.