Supports a number of physiologic functions, including cardiovascular health and muscle function* Potassium and magnesium are essential for healthy nerve impulse function, muscle contraction, cardiovascular function, acid/alkaline balance and carbohydrate and nutrient metabolism. Magnesium also plays an important role in facilitating potassium utilization, helping to provide optimal support from this important combination.* Potassium and magnesium provide key roles in heart, muscular, and nerve health.* Ingredients:Potassium Magnesium (citrate) Supplemental Facts Amount Per Serving each vegetarian capsule contains: potassium (as potassium citrate) 140 mg. magnesium (as magnesium citrate) 70 mg. other ingredients: ascorbyl palmitate, vegetarian capsule (cellulose, water) 2 capsules daily, in divided doses, with meals.