As a caution to all...please be aware that more calcium is not always better, and in fact can actually be life threatening! I know from experience of my Mom's death. She was a huge proponent of calcium and urged everyone to take it, as she did, thinking it was just a supplement. If you take large doses, or do not take enough vitamin D-3 WITH K-2, then the calcium is not directed and absorbed by your bones. Instead it goes to your arteries around your heart and causes calcification of those arteries, which causes Myocardial Infarction, basically a heart attack which killed my Mom. Do your research, and you need to also calculate the calcium received from food in with the supplements taken. Should not be over 1200 mg. total. You can track the calcium from food by recording what you eat on mymealplanner.com, it will calculate the total calcium.