Magnesium contributes to a reduction of tiredness and fatigue, supports electrolyte balance, the nervous system, normal muscle function, normal psychological function and the maintenance of normal bones and teeth. Ingredients:INGREDIENTS: Half a level teaspoon (2.5 grams) approximately provides: Magnesium (citrate) 375mg Directions:As a food supplement, stir half a level teaspoon into water or juice and drink once daily, or as directed by your healthcare professional.