Dolomite is a form of the rock limestone, and contains high levels of magnesium carbonate and calcium carbonate. For this reason, it is commonly used as a supplement for magnesium and calcium. It is also known to be used in animal feeds to increase the intake of magnesium and calcium in their diets.
WARNING: Side effects may include upset stomach, diarrhea, constipation and/or vomiting. Pregnant and breastfeeding women should avoid this as there is risk of heavy metal contamination.