Magnesium Citrate powder. Magnesium helps reduce tiredness and fatigue. It contributes to the normal functioning of the muscles and nervous system, to normal psychological function, to normal energy metabolism, to electrolyte balance, to normal protein synthesis, to the maintenance of bones and teeth in normal conditions and to the process of cell division. . Instructions for use: Recommended daily dose: half a small spoonful (approximately 2.4 g) per day.\ How to use: take half a small spoonful dissolved in water, juices or milk.