ZMST is a formulated supplementary sports food supplying the important electrolyte magnesium and other cofactors that are often depleted during exercise? Zinc, Magnesium, Selenium, and Taurine (ZMST) are essential nutrients for individuals. Because of our modern lifestyles, these nutrients are often deficient in the Western Diet and have been depleted from our soils and not found in adequate levels in our foods. Ingredients per capsule Magnesium Citrate (100mg elemental Magnesium) Zinc gluconate (2.5mg elemental Zinc) Organic Selenium yeast Saccharomyces cerevisiae (6.25mcg elemental selenium) Taurine 25mg