Muscle Mag helps reduce muscle tightness by reducing lactic acid formation. It helps your body get a better response from exercise and/or daily use.* Muscle Mag is a special formulation of magnesium bound to malic acid, with important co-factors. Malic acid (malate) is the most important Krebs Cycle nutrient that prevents muscle fatigue. This helps cells sustain aerobic energy production longer with less lactic acid formation. Magnesium enables muscle to relax, so they don't tighten up too much as well as assisting in the final steps of cellular energy production. Magnesium is also the most important mineral to relax the circulatory system and smooth out the nerve signals to the heart. Dose ranges from 2-6 per day.* Quality of magnesium is important. Magnesium oxide is a cheap salt of magnesium and never used in Wellness Resources products. Oxide salts break apart in metabolism and the oxide requires an antioxidant to neutralize it. Why spend precious antioxidants neutralizing a low quality form of magnesium supplement? Companies using oxide minerals are clearly not quality focused, regardless of what they say.