Rainbow Light Food-Based Calcium 180 Tablets 
Calcium-Food Based by Rainbow Light 180 Tablet Food-Based Calcium Potent Science-Safe Gentle on the Stomach 100 Natural Delivers 500 mg calcium 250 mg magnesium in just one tablet with vitamin D and glutamic acid HCl natural cofactors to ensure assimilation plus botanicals with a natural concentration of minerals such as horsetail and nettles