Role of Coffee With Kidney Stones

Kidney stones are small, crystallized mineral deposits that form in the kidneys. There has been much recent speculation over coffee's effect on kidney stones. Different research suggests it plays either a preventative or contributing role in their formation.

Fluid Intake

• Most patients with kidney stones are advised to increase their fluid intake to encourage a natural passing. Since coffee is a natural diuretic, it is highly effective at raising urinary volume for this purpose.

Hormonal Influence

• In a Harvard study, it was speculated that the caffeine in coffee interferes with the creation of a urine-reducing hormone. As a result, the body produces more urine that prevents formation of kidney stones.

Magnesium and Citrate

• Caffeinated coffee has also been observed to elevate of levels magnesium and citrate in urine; these components are believed to counteract kidney-stone-causing minerals.

Calcium

• Since kidney stones are primarily composed of calcium, some researchers note that the increased levels of magnesium and citrate are not significant enough to offset the effects of calcium-rich urine.

Facilitating Properties

• Caffeine also has been observed to facilitate the production of calcium and sodium. Urine rich in calcium and sodium can lead to the growth of kidney stones.