Evidence supporting the use of: Orange
For the health condition: Kidney Stones

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Synopsis

Source of validity: Scientific
Rating (out of 5): 4

Oranges are sometimes recommended as a dietary support for kidney stone prevention, and this recommendation is primarily justified by scientific evidence. Oranges are rich in citrate, a compound known to inhibit the formation of certain types of kidney stones, particularly calcium oxalate stones. Citrate binds to calcium in the urine, reducing the chance of stone formation. Several clinical studies have demonstrated that increased intake of dietary citrate, either from citrus fruits like oranges or lemon juice, can elevate urinary citrate levels and help prevent stone recurrence.

For example, a study published in the Journal of Urology (2006) found that orange juice increased urinary citrate and pH, both of which are protective against stone formation. Another clinical trial (Kang et al., 2007) compared orange juice and lemonade, showing that both increased urinary citrate, but orange juice also increased urinary pH, which may offer additional benefit for certain stone types.

It is important to note that while orange juice is beneficial for citrate content, it does contain natural sugars, and excessive consumption may not be suitable for everyone, especially those with diabetes or those prone to uric acid stones. Still, most nephrologists and urologists recognize the scientific basis for recommending increased dietary citrate as part of a kidney stone prevention strategy, and oranges are a practical, food-based source.

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