The Calcium and Magnesium in this product are chemically bonded with natural citric acid to form Calcium Citrate and Magnesium Citrate.

Ingredients: Protein <1 g,Calcium (as Calcium Citrate, Calcium Hydroxide) 1000 mg, Magnesium (as Magnesium Oxide, Magnesium Citrate) 1000 mg  

Other Ingredients: Gelatin Capsule, Magnesium Stearate, Parsley (leaf), Watercress (leaf), Alfalfa (leaf), and Dandelion (root)