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Specific Diet Shown to Reduce Risk of Kidney Stones

Last Updated: August 14, 2009.

The Dietary Approaches to Stop Hypertension diet can reduce kidney stone formation, according to a study published online Aug. 13 in the Journal of the American Society of Nephrology.

FRIDAY, Aug. 14 (HealthDay News) -- The Dietary Approaches to Stop Hypertension (DASH) diet can reduce kidney stone formation, according to a study published online Aug. 13 in the Journal of the American Society of Nephrology.

Eric N. Taylor, M.D., of Brigham and Women's Hospital in Boston, and colleagues studied 45,821 men from the Health Professionals Follow-up Study, 94,108 older women from the Nurses' Health Study, and 101,837 younger women from the Nurses' Health Study II.

The researchers found that higher DASH scores were associated with a significantly lower risk of kidney stones in men, older women, and younger women (relative risks, 0.55, 0.58, and 0.60, respectively).

"Although we think it reasonable for calcium oxalate stone formers with high levels of urinary oxalate to avoid intake of some individual foods very high in oxalate (such as spinach and almonds), our data do not support the common practice of dietary oxalate restriction in calcium stone formers, particularly if such advice results in lower intake of fruits, vegetables, and whole grains," the authors conclude. "Because of the adverse side effect profile of many current medical therapies for nephrolithiasis, a randomized trial is needed to determine the efficacy of a DASH-style diet compared with medical intervention for the secondary prevention of calcium oxalate kidney stones."

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