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Wednesday, February 19, 2014

Limiting Animal Protein Intake May Be Beneficial for Kidney Stone Formers

In a crossover study of 15 individuals consuming different diets during 3 one-week phases, beef was linked with lower serum uric acid values than chicken or fish (6.5 mg/dL vs. 7.0 mg/dL and 7.3 mg/dL, respectively), and fish (741 mg/day) was associated with higher urinary uric acid levels than beef (638 mg/day) or chicken (641 mg/day). No significant differences in urinary pH, sulfate, calcium, citrate, oxalate, or sodium were observed in the Journal of Urology study. Average saturation index for calcium oxalate was highest for beef (2.48), although the difference reached significance only compared with chicken (1.67), not fish (1.79).

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