Sundown Magnesium 500 mg provides an important mineral that supports normal muscle and nerve function, helps maintain healthy bones and teeth, and contributes to energy production. It also supports normal heart function, helps maintain electrolyte balance, and may reduce fatigue associated with magnesium deficiency. This supplement is ideal for individuals who do not get enough magnesium through their diet. It should be taken as directed, and a healthcare professional should be consulted before use if you have a medical condition or take prescription medications.