Supplement based on Magnesium Glycerophosphate, Magnesium Pidolate and Vitamin B3. Magnesium is an essential mineral of fundamental importance for the function of the body: it helps reduce tiredness and fatigue and promotes muscle function, as well as contributes to protein synthesis and the normal functioning of the nervous system. Instructions for use: Take 1 sachet (3.5 g) per day to dissolve in 200 ml of water.