Oxalate and Citrate

"Consuming a special drink (sodium oxalate) during an all day visit to the University of Chicago research clinic~Subjects in both arms will be asked to partake in the same activities, as follows: The day before presenting to the research clinic subjects will collect urine at home. Subjects will will come in to the research clinic at the University of Chicago in Hyde Park, where they will spend most of the day. We will give them a special liquid that contains oxalate, and they will receive a specially prepared breakfast that is low in oxalate and citrate. After this, we will collect urine and blood throughout the day. While at the clinic, subjects will also receive specially prepared snacks."