A nutritional composition comprises (a) one to a plurality of physiologically acceptable calcium salts and/or chelates and (b) one or more phosphorus-containing components, such as phosphate salts, and/or phosphorus-rescuing components, such as phytase. The composition is useful for phosphorus-sparing calcium supplementation of the diet of a human subject, and for treatment of a low bone density condition in a human subject in need thereof.
