Magnesium is one of the body's most important minerals. It is required as a cofactor in hundreds of enzymatic processes within cells. Life Extension Magnesium Citrate helps maintain normal muscle and nerve function, keeps heart rhythm steady, promotes healthy cardiovascular function, supports a healthy immune system, and keeps bones strong. Life Extension Magnesium Citrate also helps maintain blood sugar and blood pressure levels already within normal range, and it is known to be involved in energy metabolism and protein synthesis. Scientific literature documents the need for a wide range of minerals, including calcium and magnesium, that are vital to maintaining strong, healthy bones.*