Any recommendations on preventing recurrent kidney stones?

Calcium stones, particularly calcium oxalate and less often calcium phosphate, are the most common type of kidney stone, making up 80% of cases. A few dietary modifications can be instituted to decrease recurrence of calcium stones:
  • Drink adequate fluids to produce at least 2 liters of urine per day. This will decrease urine solute concentration.
  • Increase fruit and vegetable intake. These foods increase renal citrate excretion and decrease risk of calcium oxalate stone formation.
  • Limit animal protein. A risk factor particularly in men for some reason.
  • Limit sodium intake. A low sodium diet enhances sodium and calcium reabsorption in the proximal tubule.
  • Limit dietary sucrose and fructose which increase urine calcium excretion.
  • Limit dietary oxalate (spinach, rhubarb, peanuts, cashews, almonds).
  • DON'T limit calcium intake as this can lead to increased oxalate absorption due to decreased binding by calcium in the intestinal lumen.
Bottom line. Drink plenty of fluids and eat a healthy diet.

Source

Preminger, G. MD. "Evaluation of the adult patient with established nephrolithiasis and treatment if stone composition is unknown." Up to Date. Oct 2008.

Curhan, G. MD. "Prevention of recurrent calcium stones in adults." Up to Date. Oct 2008.
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