Warner Marine Research Concentrated Magnesium Supplement is the premier Magnesium product available today. It is a technologically advanced ionically balanced product containing high quality Analytical Reagent Grade (A.C.S.) and Pharmaceutical Grade (U.S.P.) raw materials. Warner Marine Research is the only manufacturer to use these fine quality raw materials. It is also highly concentrated, making it highly cost effective compared to lower quality competing products. Most importantly Warner Marine Research Concentrated Magnesium is highly effective at adding high quality bio-available Magnesium without the unneccesary impurities found in the competitors products.