6 Simple Ways to Prevent Kidney Stones
6 Simple Ways to Prevent Kidney Stones
Kidney stones are a common and often painful condition that affects millions of people each year. These hard deposits form when minerals and salts in the urine become concentrated and crystallize inside the kidneys. While some stones are small enough to pass naturally, others can cause severe pain, block the urinary tract, or require medical procedures to remove.
The good news is that many kidney stones are preventable. For people who have had a kidney stone before, making a few simple lifestyle changes can significantly reduce the risk of developing another one. The best prevention plan depends on the type of stone you have, but several evidence-based habits benefit most people.
Here are six simple ways to help prevent kidney stones and keep your kidneys healthy.
1. Stay Well Hydrated
Drinking enough fluids is one of the most effective ways to reduce the risk of kidney stones.
When you are dehydrated, your urine becomes more concentrated, allowing minerals such as calcium, oxalate, and uric acid to crystallize and form stones. Adequate hydration dilutes these substances, making stone formation less likely.
Most healthy adults should drink enough fluids to produce at least 2 to 2.5 liters (about 68 to 85 ounces) of urine per day, although the exact amount of fluid needed varies depending on climate, activity level, and overall health.
Helpful tips include:
Carry a reusable water bottle.
Drink water regularly throughout the day, not just when you feel thirsty.
Increase fluid intake during hot weather or exercise.
Monitor your urine color—it should generally be pale yellow.
If you have heart failure or advanced kidney disease, ask your healthcare provider how much fluid is appropriate for you.
.
.
.
2. Reduce Sodium (Salt) Intake
A diet high in sodium increases the amount of calcium released into the urine, which can raise the risk of calcium-based kidney stones.
Many people consume much more sodium than they realize because it is hidden in processed and packaged foods.
To reduce sodium:
Limit processed and fast foods.
Choose fresh fruits and vegetables.
Read nutrition labels.
Use herbs and spices instead of salt for flavor.
Rinse canned vegetables and beans before eating when possible.
Lowering sodium intake also benefits blood pressure and heart health.
3. Eat the Right Amount of Calcium
Many people mistakenly believe they should avoid calcium if they have calcium kidney stones.
In fact, getting enough calcium from foods is generally recommended because dietary calcium binds to oxalate in the intestines, reducing the amount of oxalate absorbed into the bloodstream and excreted in the urine.
Good food sources include:
Low-fat milk
Yogurt
Cheese
Calcium-fortified foods
Calcium supplements may increase stone risk in some people if not used appropriately. If you need supplements, discuss the timing and dosage with your healthcare provider.
4. Limit Foods High in Oxalates If Recommended
Oxalate is a natural substance found in many healthy foods. In susceptible individuals, excess oxalate in the urine can combine with calcium to form calcium oxalate stones.
Foods relatively high in oxalates include:
Spinach
Rhubarb
Beets
Swiss chard
Almonds
Peanuts
Chocolate
Sweet potatoes
Most people do not need to eliminate these foods completely. Instead, your healthcare provider or dietitian may recommend moderation, especially if you have had calcium oxalate stones.
Eating calcium-rich foods at the same meal can help reduce oxalate absorption.
5. Eat Less Animal Protein
Large amounts of animal protein can increase the risk of certain types of kidney stones by:
Increasing uric acid production
Lowering urine citrate (a natural substance that helps prevent stones)
Making urine more acidic
Foods to moderate include:
Red meat
Processed meats
Poultry
Organ meats
Shellfish
You don’t have to eliminate animal protein, but replacing some meals with plant-based protein sources such as beans, lentils, and tofu may help reduce stone risk while supporting overall health.
6. Maintain a Healthy Lifestyle
Several healthy habits work together to lower the risk of kidney stones.
These include:
Maintaining a healthy weight
Exercising regularly
Managing diabetes
Controlling high blood pressure
Avoiding excessive sugary drinks, especially those sweetened with high-fructose corn syrup
Limiting excessive alcohol consumption
Following your healthcare provider’s recommendations if you have gout or other metabolic conditions
If you have had recurrent kidney stones, your healthcare provider may also prescribe medications to help prevent future stones, depending on the stone type and results of metabolic testing.
Who Is at Higher Risk?
Certain factors increase the likelihood of developing kidney stones, including:
Previous kidney stones
Family history of kidney stones
Dehydration
Obesity
Type 2 diabetes
Gout
Certain digestive disorders
Bariatric surgery
Diets high in sodium or animal protein
Some medications
Knowing your personal risk can help guide prevention strategies.
Can All Kidney Stones Be Prevented?
Not all kidney stones can be prevented, particularly those caused by inherited conditions or certain medical disorders.
However, for many people, lifestyle changes combined with appropriate medical treatment can significantly reduce the risk of recurrence.
If you pass a kidney stone, your healthcare provider may recommend laboratory analysis of the stone and additional urine or blood tests to determine its type and identify the most effective prevention plan.
When Should You See a Doctor?
Schedule a medical evaluation if you experience:
Blood in your urine
Pain while urinating
Frequent urinary tract infections
Persistent flank or back pain
A history of recurrent kidney stones
Seek emergency medical care immediately if you develop:
Severe pain that does not improve
Fever or chills with suspected kidney stones
Persistent vomiting
Difficulty or inability to urinate
Severe pain with blood in the urine
These symptoms may indicate a blocked urinary tract or a serious infection that requires urgent treatment.
The Bottom Line
Kidney stones are common, but many cases can be prevented through healthy daily habits. Staying well hydrated, reducing sodium intake, consuming adequate dietary calcium, moderating high-oxalate foods when appropriate, limiting excessive animal protein, and maintaining a healthy lifestyle are all proven strategies that can lower your risk.
If you’ve had a kidney stone before, talk with your healthcare provider about the type of stone you had and whether additional testing or preventive medication is appropriate. A personalized prevention plan—combined with consistent healthy habits—offers the best chance of avoiding future stones and protecting your long-term kidney health.