I take vitamin d to strengthen bones because of my history with kidney stones and taking a calcium supplement isn't good for me because one of the main things that make up my kidney stones is calcium. As a result, I can't take calcium supplements and don't. I guess to answer your question, one would have to know how your body handles calcium. Does it throw the excess of it off and out of your system or does that excess help make stones in your body. I can't answer that and your personal health history should show you the answer to your question.