Spring Valley Magnesium Tablets Dietary Supplement, 250 mg is specially formulated to provide a nutritional boost to your nerve, muscle and heart health.* Magnesium is also essential in the formation of bone, making it beneficial to your skeletal system.* Each tablet delivers 250 mg of magnesium. This formula is free of gluten, sugar, lactose, artificial colors and flavors, and is suitable for vegan and vegetarian diets.