Magnesium malate (Source Naturals). Each bottle, 180 tablets. Each tablet, 1,000 mg of magnesium malate, yielding 152 mg magnesium and 825 mg of malic acid. Muscle cramps, weakness and fatigue are all anecdotally said to improve using this. The CFIDS Health Resources Buyer's Club says it may help aching muscles, and improve proper muscle function by increasing ATP. It may increase stamina (malic acid is used to help convert fats and sugars to ATP). Malic acid has the added benefit of chelating (grabbing) aluminum. Source Naturals states that free form malic acid may promote undesirable absorption of aluminum. They state further that magnesium malate allows absorption of both compounds, and makes it easier for the malic acid to exchange the magnesium for aluminum (and remove it from the body, one hopes). The rest of the malic acid may get into cells where it is normally found and participate in the Krebs cycle (a complicated series of reactions that starts with pyruvic acid and results in liberation of energy). Suggested use is 1-3 tablets per day with meals.