What are you doing about osteoporosis?
As we noted earlier, the US Food and Drug Administration (FDA) is considering updating what it will allow as a health claim related to calcium for osteoporosis. If you read that article you'll recall my scepticism about their motivation and intentions. Nevertheless, they are correct in their acceptance of the critical role played by associated nutrients in the absorption and utilization of calcium.
Remember, for the calcium to benefit your bones, it must be ingested (you have to eat or drink it), absorbed (from you gastrointestinal tract into your blood stream) and finally assimilated (taken into the boney tissue where it can be utilized). You must also maintain a required amount of calcium circulating in your blood to meet the needs of cells throughout your body, notably skeletal and cardiac muscle cells. Failure to do so will prevent calcium from being used to build or rebuild bone because when blood levels drop you automatically draw calcium from bone to help ensure adequate cellular function.