7 Ways to Reduce the Risk of Kidney and Urinary Tract Stones
Have you had a urinary stone before and are worried about it coming back?
Treating a urinary stone can remove the stone that is currently present, but it does not necessarily prevent new stones from forming in the future. People who have had urinary stones are at risk of recurrence, particularly if the same risk factors remain, such as inadequate fluid intake, a high-sodium diet, or abnormalities in certain substances found in the urine.
The good news is that healthy lifestyle and dietary changes can help reduce the risk of recurrent urinary stones.
So, how can you prevent urinary stones from coming back? How much water should you drink? Do you need to avoid calcium? And which foods should you be careful about?
This article covers 7 practical ways to help prevent recurrent urinary stones, as well as when additional medical evaluation may be appropriate for people at higher risk.
1. Drink Enough Water to Help Prevent Recurrent Urinary Stones
Drinking enough water is one of the most important ways to help prevent urinary stones.
Adequate fluid intake makes the urine more diluted, reducing the concentration of minerals and other substances that can form crystals and eventually develop into stones.
Rather than focusing on a fixed amount of water that everyone must drink, pay attention to your urine color as one practical indicator. In general, pale yellow urine suggests adequate hydration, while dark yellow urine may indicate that you need more fluids.
People who exercise, work outdoors, or live in hot climates may lose more water through sweating and may therefore need to increase their fluid intake.
Practical tip: Do not wait until you feel thirsty before drinking. Try to drink water regularly throughout the day and adjust your intake according to your activity level, environment, and individual health needs.
2. Reduce Salt and Sodium Intake
A high-sodium diet is not only associated with high blood pressure but can also increase the risk of certain types of urinary stones.
Consuming too much sodium can increase the amount of calcium excreted in the urine, which may increase the risk of calcium stones, particularly in people who have other risk factors.
Foods that are often high in sodium include:
- Processed foods
- Sausages, ham, and bacon
- Instant noodles
- Salty snacks
- Pickled or preserved foods
- Fish sauce, soy sauce, and other high-sodium seasonings
- Ready-to-eat foods with high sodium content
Reducing sodium intake is therefore an important part of preventing recurrent urinary stones.
A simple rule: taste your food before adding seasoning and reduce the amount of salty sauces and condiments you use.
3. You Do Not Usually Need to Avoid Calcium
Should you avoid calcium if you have urinary stones?
Not necessarily. You do not automatically need to eliminate calcium from your diet.
The belief that “people with urinary stones must avoid calcium” may lead to unnecessary dietary restrictions.
For people who form calcium stones, getting an appropriate amount of calcium from food may actually help reduce the absorption of oxalate in the intestine. Calcium can bind to oxalate in the digestive tract, reducing the amount of oxalate that is absorbed into the body and eventually excreted in the urine.
On the other hand, excessively restricting dietary calcium may increase oxalate absorption in some people.
Therefore, the goal is to consume an appropriate amount of calcium from food rather than completely avoiding calcium.
Calcium supplements should be considered on an individual basis. People with a history of urinary stones should consult a doctor before taking calcium supplements regularly.
4. Be Mindful of High-Oxalate Foods
People who have had calcium oxalate stones may need to pay particular attention to foods that contain relatively high amounts of oxalate.
Examples include:
- Spinach
- Beets
- Certain types of nuts
- Chocolate
- Strong tea
However, you do not necessarily need to eliminate all foods containing oxalate.
The key is to avoid consuming large amounts of high-oxalate foods regularly and to maintain a varied, balanced diet.
For people at risk of calcium oxalate stones, consuming calcium-containing foods during the same meal may help calcium bind to oxalate in the intestine and reduce oxalate absorption.
5. Consume Animal Protein in Moderation
Eating large amounts of animal protein, particularly red meat, may be associated with factors that contribute to certain types of urinary stones. These include increased urinary excretion of uric acid and calcium and changes in urinary substances that help inhibit stone formation.
People with a history of urinary stones should therefore consume protein in appropriate amounts and choose a variety of protein sources, such as:
- Fish
- Eggs
- Lean meat
- Plant-based protein, as appropriate
The goal is not to avoid protein, but to maintain a balanced intake that meets your individual nutritional needs.
6. Be Cautious With High-Dose Vitamin C Supplements
Vitamin C obtained from fruits and vegetables as part of a normal diet is generally not something that people with urinary stones need to avoid.
However, taking high-dose vitamin C supplements regularly may increase oxalate levels in the body and may increase the risk of calcium oxalate stones in susceptible individuals.
If you have a history of urinary stones and regularly take high-dose vitamin C supplements, consult your doctor or healthcare professional before continuing long-term use.
7. Identify the Type of Stone When Possible
Effective prevention is not only about drinking more water or changing your diet. It is also important to understand what caused the stone to form in the first place.
If a stone passes naturally or is retrieved during treatment, stone analysis can help identify its composition. Different types of urinary stones have different causes and prevention strategies.
Additional evaluation may be considered for people at higher risk, such as those who:
- Have recurrent urinary stones
- Develop stones at a young age
- Have multiple stones
- Have a family history of urinary stones
- Have certain medical conditions that increase the risk of stone formation
- Develop stones again after previous treatment
A doctor may recommend additional tests, such as a 24-hour urine collection, to measure substances associated with stone formation and develop a prevention plan tailored to the individual.
Summary: How to Prevent Recurrent Urinary Stones
| What You Can Do | How It May Help |
|---|---|
| Drink enough water | Dilutes urine and reduces the concentration of substances that can form crystals |
| Reduce salt and sodium | May reduce urinary calcium excretion |
| Get an appropriate amount of calcium from food | May reduce oxalate absorption in the intestine |
| Limit excessive intake of high-oxalate foods | May reduce urinary oxalate in people who are at risk |
| Consume animal protein in moderation | Helps reduce dietary factors that may contribute to certain types of stones |
| Avoid unnecessary high-dose vitamin C supplements | May reduce increased oxalate production in susceptible individuals |
| Have the stone analyzed when possible | Helps identify the stone type and guide prevention |
| Consider a 24-hour urine test when recommended | Helps identify urinary abnormalities associated with stone formation |
Frequently Asked Questions About Preventing Recurrent Urinary Stones
How much water should I drink if I have had urinary stones?
There is no single amount that is appropriate for everyone. Fluid requirements depend on factors such as body size, diet, activity level, sweating, climate, and underlying medical conditions.
The goal is to maintain adequate urine volume and dilute urine. People with medical conditions that require fluid restriction should consult their doctor before increasing their fluid intake.
Do I need to avoid calcium if I have urinary stones?
Not necessarily.
You generally do not need to eliminate calcium from your diet. Getting an appropriate amount of calcium from food may help reduce oxalate absorption.
Calcium supplements should be taken based on individual needs and medical advice.
Can I eat vegetables if I have urinary stones?
Yes. You generally do not need to avoid vegetables altogether.
However, people who form calcium oxalate stones may need to limit excessive intake of certain high-oxalate foods. Dietary recommendations should be tailored to the type of stone and individual risk factors.
Can urinary stones come back after treatment?
Yes.
People who have previously had urinary stones can develop them again, particularly when the underlying risk factors remain.
For this reason, prevention and long-term follow-up are important even after the existing stone has been successfully treated.
What should I do if I keep developing urinary stones?
If urinary stones occur repeatedly, consult a doctor for further evaluation. Your doctor may recommend stone analysis and a 24-hour urine test to identify factors that contribute to stone formation and develop a more targeted prevention plan.
Conclusion: Preventing Urinary Stones Starts With Everyday Habits
Treating a urinary stone does not necessarily mean that you will never develop another stone. Long-term prevention is therefore an important part of urinary stone care.
Simple steps can make a difference, including drinking enough water, reducing salt and sodium, getting an appropriate amount of calcium from food, avoiding excessive intake of high-oxalate foods and animal protein, and avoiding unnecessary high-dose vitamin C supplements.
For people who experience recurrent urinary stones, identifying the type and underlying cause of the stones can help doctors develop a more personalized prevention strategy.
If you experience severe pain in the back, side, or flank, blood in the urine, painful urination, nausea, vomiting, or symptoms that may suggest a urinary stone, seek medical attention for appropriate evaluation and treatment.
Effective stone prevention is not only about treating the stone you have today—it is also about reducing the chance of developing another stone in the future.
