Which of the following would help prevent recurrent kidney stones?

• A. Increase fluid intake and reduce colas
• B. Increase cola intake and reduce fluids
• C. Limit fluids and increase salt intake
• D. Rely on antibiotics only

Answer: (A)

Hydration is the cornerstone of preventing recurrent kidney stones, because diluting the urine lowers the concentration of stone-forming substances and reduces crystallization. Increasing fluid intake directly answers this by expanding urine volume and keeping solute levels down, making stone formation less likely. Choosing beverages wisely matters too; reducing colas helps because cola drinks can contribute to dehydration and contain phosphates and caffeine that can alter urine chemistry in ways that may favor stone formation.

Increasing cola intake or limiting fluids would concentrate the urine and raise stone risk, while limiting fluids and increasing salt promotes calcium loss in urine, also increasing stone risk. Relying on antibiotics alone doesn’t address the metabolic processes behind stone formation and won’t prevent recurrence.