CalMag is a relaxing calcium and magnesium drink with a 2:1 ratio of calcium to magnesium. Each serving delivers 400 mg calcium and 200 mg magnesium. Essential minerals, calcium and magnesium work together to support bone and muscle health. Contains no yeast, dairy, egg, gluten, soy, wheat, sugar, starch, preservatives or artificial colors or flavors. Non-GMO. When it comes to Calcium and Magnesium, it is a Matter of Balance: Calcium Deficiency can be a serious issue, however, we believe calcium should always be taken with the magnesium it requires for assimilation. Without a proper balance of these two minerals, magnesium becomes depleted, which can result in the negative effects associated with lack of magnesium and a build up of unassimilated calcium such as kidney stones, etc. Magnesium is necessary for over 300 different biochemical processes, Such as digestion, energy production & the metabolism of proteins, fats & carbohydrates. Suggested use: Begin with 1 Tbsp. This product may have a laxative effect. If that occurs, cut back on the amount to find what is tolerable. Over time the amount can be increased back to the suggested serving size.