What dietary change can help decrease the recurrence of calcium oxalate kidney stones?

Increasing dietary calcium can help decrease the recurrence of calcium oxalate kidney stones because it binds to oxalate in the intestines. When calcium combines with oxalate in the gastrointestinal tract, it forms calcium oxalate complexes that are less likely to be absorbed into the bloodstream and subsequently excreted in the urine. This mechanism can decrease the levels of free oxalate that might otherwise contribute to stone formation in the kidneys.

Inadequate calcium intake can lead to increased oxalate absorption from the gut, thereby increasing the risk of calcium oxalate stone formation. Therefore, maintaining an appropriate level of dietary calcium is essential as part of a broader strategy to prevent stone recurrence, often in combination with other dietary considerations, such as moderating oxalate-rich foods and ensuring appropriate hydration.

Other dietary factors mentioned, such as increasing protein or sodium intake, may have adverse effects on stone recurrence. Increasing protein can lead to higher calcium excretion in the urine, while excess sodium may increase urinary calcium excretion, both of which can contribute to a higher risk of stone formation. Decreasing potassium intake is not typically a recommended change for stone prevention. Therefore, increasing dietary calcium is a well-established recommendation for reducing the recurrence of calcium oxalate