Magnesium Fire Nutrtion® Gas Series can be taken by athletes of all levels, students and people who have suffered episodes of prolonged stress. Magnesium contributes to normal muscle maintenance, is involved in muscle contraction and relaxation, is important in the synthesis of proteins and DNA, contributes to normal energy metabolism, to the maintenance of the nervous system in normal conditions, to normal psychological function, and to electrolyte balance. Instructions for use: Take 3 capsules a day.