Role of Citrus Fruit Juices in Prevention of Kidney Stone Disease

The prevalence of Kidney Stone Disease (KSD) has been on the rise in recent decades, affecting over 10% of the population. Guidelines from both the EAU and AUA recommend specific dietary measures to prevent stone formation and recurrence. These guidelines advocate for moderation in salt, protein, and calcium intake, while emphasizing the importance of consuming enough fluids to produce a daily urine output of at least 2–2.5 liters.
An article published in the Nutrients journal delves into the correlation between the consumption of citrus fruit juices and KSD. Through a comprehensive review, three large-scale epidemiological studies indicated an escalated risk of urinary stone formation associated with grapefruit juice intake, while highlighting a protective aspect linked to the consumption of orange juice. Despite the apparent protective role of orange juice against stone formation, its high sugar content necessitates consideration. Lemon juice emerged with a protective effect due to its ability to elevate urinary citrate levels, although it did not exhibit a significant alkalizing impact on urine pH. Citrus fruit juices manifest their potential protective effects through various mechanisms. Firstly, the increase in fluid intake itself is advantageous. Secondly, the citrate content present in these juices serves as a potent inhibitor of urinary stone formation. Citrate, within the urine, actively hampers the spontaneous creation and aggregation of calcium oxalate crystals. This action of citrate in urine holds substantial significance, especially considering that many KSD patients suffer from hypocitraturia. Further details are available in the original manuscript accessible through the provided link.