The two main dietary bone health-promoting nutrients are Calcium, a mineral naturally found in bone; and Vitamin D, a vitamin required to absorb calcium from your intestine.
With enough sunlight, our bodies will synthesize Vitamin D in quantities great enough for adequate calcium absorption. Calcium, on the other hand, must come from external sources or your body will start to use up the calcium stored in bone for other body functions.
Calcium is a mineral essential for many cellular functions including bone mineralization and muscle contraction. Calcium deficiency leads to osteoporosis and neuromuscular disorders including convulstions, heart rythmn disturbances, numbness and even paralysis.
The best source of calcium is in foods. Calcium supplements, though effective at correcting low calcium states, may cause other side effects in the body including kidney or bile stones, bone pain, nausea and vomiting, and pancreatitis among other conditions.