In a study of 96,000 women age 27 to 44, those who drank the most fluids (average: 131⁄2 cups/day) had a 32 percent lower risk of developing a kidney stone than those who drank the least (five cups/day).
Also, women who got the most calcium from foods had a 27 percent lower risk. Calcium supplements had no impact or risk.
Researchers discovered that phytate—found largely in beans, whole-grain cereals, and breads—seemed to protect kidneys. Conversely, eating more sugar (sucrose) increased risk.
Conclusion: drink fluids, avoid excess sugar, and eat more beans and whole grains.
Archives of Internal Medicine
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