Magnesium is an essential nutrient to the human body, acting as a key component of more than 300 biochemical reactions within the body. From maintaining nervous system and muscle function to supporting a healthy immune system, magnesium keeps the human body functioning correctly. In addition to its support of the nervous, muscular, and immune systems, magnesium also helps regulate cardiac rhythm, and is vital to maintaining strong, healthy bones. Most importantly to those interested in health and personal fitness, magnesium also helps regulate blood glucose levels, and is integral to the production of energy and naturally occurring proteins. An adult body needs anywhere from 400 to 420 mg of magnesium daily in order to maintain healthy functioning of bodily processes, and is naturally occurring in the green leafy vegetables such as spinach, legumes, nuts, seeds, and whole grains. Magnesium is also found in tap water, mineral water, and bottled waters, but the total magnesium content of most water varies greatly based on location and available brands. Approximately 30-40% of an adult’s daily intake of magnesium is consumed as a part of their diet. Dietary supplements are also available in various forms such as magnesium oxide, citrate, and chloride.