Water is the single most important drink for kidney stone prevention and management, but it’s not the only beverage that helps. Aiming for about 3 liters (roughly 12 cups) of total fluid per day keeps your urine dilute enough to prevent the mineral buildup that forms stones. Beyond water, certain drinks actively fight stone formation, while others make the problem worse.
Water: How Much You Actually Need
The goal is simple: drink enough fluid that your urine stays clear or pale yellow throughout the day. Dark urine means waste products are too concentrated, which creates the conditions for crystals to form and grow into stones. The NHS recommends up to 3 liters of fluid daily for people trying to prevent stones from returning, and most of that should come from water.
Tap water works well for most people. If you prefer mineral water, research in BJU International found that hard mineral water (high in calcium and magnesium) may actually benefit calcium oxalate stone formers. A mineral water rich in magnesium, calcium, and bicarbonate raises urine pH and increases concentrations of natural stone inhibitors like magnesium and citrate. Even though urinary calcium goes up slightly, the overall risk of calcium oxalate crystal formation decreases. So a water filter to soften your water is likely unnecessary if kidney stones are your concern.
One thing that doesn’t help: alkaline water. Despite marketing claims, commercially available alkaline water has negligible alkali content and provides no added benefit over regular tap water for people with uric acid or cystine stones.
Lemon Juice and Citrus Drinks
Citrate, a compound found in citrus fruits, binds to calcium in your urine and blocks stone formation. The juice of two lemons per day (or half a cup of lemon juice concentrate diluted in water) can measurably increase urine citrate levels and reduce your risk.
There’s an important distinction between different citrus juices, though. Orange juice is the standout performer. It raises both urine citrate and urine pH, which matters for people with uric acid stones who need more alkaline urine. Lemonade, by contrast, contains citric acid in a form that doesn’t significantly alkalize urine. It still provides some citrate benefit for calcium-based stones, but if you’re dealing with uric acid stones specifically, orange juice is the better choice.
What to Drink for Uric Acid Stones
Uric acid stones form when urine is too acidic. The primary treatment is raising your urine pH, and your doctor will likely prescribe potassium citrate to do that. But beverages play a supporting role.
Orange juice is the most effective drink option because it both provides alkali and increases fluid intake. Three or fewer servings per day of citrus fruit juice can meet the clinical target for daily alkali intake. Baking soda dissolved in water is another option sometimes recommended. A quarter teaspoon of baking soda delivers the highest alkali load per serving of any common home remedy, though it does add about 1 gram of salt to your daily diet if you take the commonly suggested dose of a quarter teaspoon in the morning and a half teaspoon in the evening.
Milk and Calcium-Containing Drinks
This surprises most people: drinking milk or eating dairy doesn’t increase your risk of calcium stones. It actually helps prevent them. The National Kidney Foundation recommends consuming calcium-rich foods and drinks like milk, yogurt, and some cheeses alongside meals, especially meals containing high-oxalate foods like spinach, nuts, or chocolate.
The reason is straightforward. When calcium from dairy meets oxalate from food in your stomach and intestines, the two bind together before they ever reach your kidneys. That bound calcium-oxalate complex passes through your digestive tract instead of being absorbed into your bloodstream and filtered into your urine. The key is timing: have your calcium with meals, not on an empty stomach.
Coffee and Tea
Moderate coffee and tea consumption appears to be safe for most stone formers, and some research suggests caffeine may modestly reduce risk. Both beverages contribute to your daily fluid total, which is beneficial on its own. Black tea does contain oxalate, so if you’ve been told you form calcium oxalate stones, keeping tea intake moderate (a few cups per day rather than large quantities) is reasonable. Green tea generally has lower oxalate levels than black tea.
Drinks That Increase Stone Risk
Sugar-sweetened sodas and other drinks high in fructose are the biggest offenders. Research published in Kidney International found that people with the highest fructose intake had a 27% to 37% increased risk of developing a new kidney stone compared to those with the lowest intake, with the effect varying by age and sex. The mechanism involves fructose increasing urinary calcium and uric acid excretion while reducing urine volume.
Diet sodas aren’t as clearly linked to stone risk, but they also provide none of the protective benefits of water or citrus drinks. If you’re choosing between beverages, they’re a neutral option at best.
Cranberry Juice
Cranberry juice has a complicated reputation in the kidney stone world. The National Kidney Foundation lists cranberry juice in the “recommended” column for calcium oxalate stone formers, and it does increase fluid intake. However, cranberry juice acidifies urine, which could be problematic for uric acid stone formers who need their urine to be more alkaline. If you know your stone type, that information should guide whether cranberry juice is a good fit for you.
Apple Cider Vinegar
Apple cider vinegar is a popular home remedy, with proponents claiming it can dissolve kidney stones. The evidence for this is preliminary, and no large clinical trials have confirmed these claims. Some urologists suggest that vinegar may help reduce stone formation, but the research is still ongoing. If you do try it, the typical recommendation is 2 tablespoons diluted in 6 to 8 ounces of water, with no more than 8 ounces of the mixture per day. Too much can erode tooth enamel, cause acid reflux, and irritate your throat.
A Practical Daily Approach
The best strategy combines volume with variety. Start each morning with a glass of water with lemon juice. Drink water consistently throughout the day, aiming for that 3-liter total. Have milk or a calcium-rich drink with meals that include high-oxalate foods. Coffee or tea in moderate amounts count toward your fluid goal. Include a glass of orange juice if you’re prone to uric acid stones.
What you avoid matters just as much. Cutting back on sugar-sweetened sodas, energy drinks, and sweetened iced teas removes one of the most consistent dietary risk factors for new stones. The color of your urine remains your simplest daily feedback tool: if it’s consistently pale or clear, you’re drinking enough.