This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. The goal of this project is to continue efforts toward identifying potential deleterious effects of high animal protein diet on bone metabolism and kidney stone formation, and ascertain the value of potassium alkali as a countermeasure. The overall hypotheses to be tested are: 1) a high animal protein intake confers an acid load, which then causes bone loss and increases stone-forming risk, 2) potassium citrate corrects these deleterious effects by 'neutralizing' the acid load, 3) intestinal calcium absorption is enhanced by potassium alkali in the setting of an acid load. The model for animal protein excess adopted in this effort is the Atkins' diet, where in the restriction of carbohydrates and liveral intake of fat leads to an exaggerated intake of animal proteins that confers a marked acid load.
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