Prairie Naturals Mag Force - Designed specifically to provide relief for those suffering form Fibromyalgia (FMS), Prairie Naturals Mag Force is a synergistic combination of Magnesium Citrate and Malic Acid. Fibromyalgia patients typically show lower than normal levels of Magnesium. Magnesium in Citrate form is easily absorbed and readily available for immediate transport. Malic Acid is essential for the production of ATP (Adenosine Triphosphate), which helps prevent muscle weakness and fatigue, which are common symptoms experienced by FMS sufferers.