If you drink lots of Colas and other carbonated drinks, that get their bubbles from phosphorus, containing the mineral phosphate, you may be flushing calcium from your bones.
From publication, Natural Healing and Nutrition 1990:
Phosphate, along with calcium, is in your bones in 1 to 1 ratio. The trouble is, if you pour in too much phosphate, your body will excrete it – and when phosphate leave, it takes calcium with it. Where does it get the calcium? From your bones.
So try to limit yourself to two servings of phosphate-containing sodas each day. Better yet, check the labels and choose carbonated beverages that don’t contain phosphates. (Carbonated mineral waters do not contain phosphate.) And whenever possible, ask yourself whether a glass of low-fat milk might satisfy your thirst just as well.
Children are the target of many soft-drink ads. Yet those under ten, whose bones are actively growing, are weakening their bones, and may even suffer impaired bone development if they overindulge in soda and don’t consume enough calcium-rich foods.