Adequate calcium intake during childhood and adolescence is especially important. The loss of too much calcium can lead to soft bones or osteoporosis. How rapidly calcium is lost depends, in part, on the kind and amount of protein you eat as well as other diet and lifestyle choices. Protein from animal products is much more likely to cause calcium loss than protein from plant foods. This may be one reason that vegetarians tend to have stronger bones than meat eaters.
Caffeine increases the rate at which calcium is lost through urine.
Diets high in sodium increase calcium losses in the urine. Alcohol inhibits calcium absorption. The mineral boron may slow the loss of calcium from bones. Exercise slows bone loss and is one of the most important factors in maintaining bone health. Sources of Calcium Exercise and a diet moderate in protein will help to protect your bones.