An eGFR result can feel like a score you need to raise. If it has fallen since your last test, you may search for a food, drink or routine that will bring it back up. But eGFR is an estimate of kidney filtration, not a number you can safely change on command. The useful first step is to learn why it changed. A temporary problem may improve when treated; chronic kidney disease (CKD) calls for a plan to protect kidney function over time.
If you want to explore a structured program about kidney-friendly habits, you can read about the Kidney Disease Solution program. Check its recommendations against your own test results and treatment plan before making changes.
The word naturally can be helpful when it means eating well, moving regularly, managing sodium and looking after your general health. It becomes misleading when it suggests that water, herbs or a particular fruit can reliably repair damaged kidney tissue.
This guide will help you interpret a low or falling eGFR, identify questions for your clinician and choose everyday habits that support your care. It will also explain why a better eGFR number does not always mean CKD has disappeared—and why a disappointing number does not mean you have done something wrong.
What is eGFR?
Estimated glomerular filtration rate, or eGFR, is an estimate of how well your kidneys filter blood. Most routine eGFR results are calculated using a blood creatinine measurement along with information used by the laboratory’s equation.
Your report may show an eGFR beside your creatinine level. Generally, the lower the eGFR, the less filtration the estimate suggests. But the number needs context. Your age, previous results, overall health and evidence of kidney damage all matter.
An eGFR is an estimate, so it is not perfectly precise. It is also not the only kidney test worth knowing. A urine albumin-to-creatinine ratio, often called uACR, can reveal albumin in the urine. Albumin is a protein that normally stays in the blood. Clinicians use eGFR and urine albumin together to assess kidney health and follow changes.
If you have been watching only your blood creatinine result, ask whether you have had a urine albumin test as well. The answer may help your clinician understand your risk and choose treatment.
For background on the blood test, see what creatinine levels mean and when to worry after that page is republished.
Can eGFR really increase?
Yes, an eGFR reading can go up. There are several possible explanations, and they do not all mean the same thing.
A person who had a temporary kidney injury may see function improve as the underlying problem is treated. Someone who had CKD before that injury may recover toward their earlier level while still having CKD.
An eGFR may also vary somewhat between tests. Because the usual estimate is based on creatinine, factors affecting that measurement can influence the reported result. Your clinician can judge whether a difference is meaningful in the context of your previous readings.
For many people with established CKD, the realistic goal is to slow further decline, manage complications and stay well—not to expect a large, permanent jump in eGFR. A stable trend can be a valuable result.
This is why the question “How do I increase my eGFR?” often has a better follow-up: “Why did my eGFR fall, and what can we do about that cause?”
First, find out whether the change is sudden
The timing matters. A result that has gradually changed over years raises different questions from a substantial drop since your last test.
If your eGFR has fallen suddenly, contact your healthcare professional promptly to ask how soon it needs review. Tell them if you have recently been unwell, had vomiting or diarrhea, noticed a change in urine output, started a medicine, or have another new symptom.
Do not wait for a week of “kidney detox” drinks to see whether the result improves. A sudden change may have a treatable cause that deserves timely assessment.
If your result has been similar across repeated tests, the conversation may focus more on long-term protection: blood pressure, diabetes if present, urine albumin, nutrition, medicines and monitoring.
Bring the actual reports to your appointment. “It was low last month” is less useful than the dates and numbers. Your clinician can compare them with your baseline and decide whether more testing is needed.
The two-number view: eGFR and uACR
It is tempting to make eGFR your only measure of success. Kidney care is broader than that.
Your eGFR helps your team understand estimated filtration. Your uACR helps show whether albumin is leaking into your urine. Both can change over time, and both can inform a care plan.
For example, a clinician may be pleased to see less urine albumin even if eGFR has not risen. They may also investigate a person whose eGFR seems reasonably preserved but whose urine albumin remains elevated. Neither result should be interpreted alone.
Ask your team:
- What is my latest eGFR?
- What were my previous results?
- Have I had a uACR test?
- Is the trend stable, improving or declining?
- How often should these tests be repeated?
- Which result should prompt me to contact you?
If you keep a personal record, include the date, not just the number. You can add a brief note about illness or medicine changes to discuss at your next appointment. Avoid drawing your own conclusion from one entry; the record is there to improve the conversation.
Step 1: Know the likely cause
“Low eGFR” describes a finding, not a complete diagnosis. The cause may guide nearly every useful next step.
High blood pressure and diabetes are common contributors to CKD. Other kidney conditions and temporary problems require different approaches. Your clinician may use blood and urine tests, your medical history, a medicine review and sometimes imaging to understand what is happening.
Ask for the explanation in plain language: “What do you think is causing my low eGFR?” If the answer is still uncertain, ask what tests or follow-up will help.
This step protects you from generic advice. A person who needs assessment for a recent kidney injury should not be treated as though their only task is to cut out salt. A person with persistent urine albumin may need a discussion about treatment beyond changing drinks.
If you need a general introduction first, start with the homepage guide to kidney disease and recovery.
Step 2: Manage blood pressure consistently
Blood pressure control is an important part of kidney care for many people. Your own target should be set with your clinician, who can account for your symptoms and other conditions.
What can you do between appointments? Take prescribed medicines as directed. If you have been asked to monitor blood pressure at home, record readings using the method your team recommends. Bring those readings to your review.
Look at sodium in your usual food. Packaged snacks, processed meats, ready meals, sauces and restaurant meals can add up even if you rarely reach for the salt shaker. Small, repeatable changes often work better than an abrupt, restrictive diet you cannot maintain.
Do not stop a prescribed blood pressure medicine because a laboratory result changed or because you read a warning online. Some medicines are prescribed to help protect kidneys in appropriate patients, and your prescriber needs to interpret results in context.
For a closer look at this relationship, read how high blood pressure and low eGFR are connected once it is live.
Step 3: Manage diabetes if it applies to you
If you have diabetes, managing it is part of protecting your kidneys. The goal is not to follow someone else’s blood sugar target; it is to understand the plan your healthcare team has set for you.
Tell your team if kidney diet advice seems to conflict with diabetes meal advice. A renal dietitian can help you work through both instead of eliminating so many foods that eating becomes stressful.
Keep taking medicines as prescribed, monitor according to your plan and bring both your kidney results and diabetes records to follow-up. Your care team may need to review treatment as kidney function or other circumstances change.
You can read more in diabetes and kidney function: how to keep your kidneys healthy when that article is republished.
Step 4: Make food changes that match your blood tests
There is no universal menu that raises eGFR. What helps one person may be unnecessary—or inappropriate—for another.
Sodium: Reducing excess sodium can support blood pressure and fluid management. Start with the foods you eat often, check labels and choose a practical substitution.
Protein: You need enough to maintain health. Some people with CKD who are not on dialysis may need help avoiding excessive intake. People receiving dialysis may have different protein needs. Ask for an individual target before making a major change.
Potassium: A low eGFR does not automatically mean every potassium-rich fruit or vegetable is forbidden. Your blood potassium result and treatment plan matter.
Phosphorus: Some people need to pay attention to phosphorus, particularly as CKD advances. Processed foods with phosphate additives may be a useful starting point when your team recommends a change.
Calories and overall nutrition: A plan that cuts out too much can leave you undernourished. If you are losing weight without trying, tell your clinician or dietitian.
Use the kidney-friendly food list and foods to limit when creatinine is high as starting points for questions, not as replacements for advice based on your own results.
Step 5: Be active within your abilities
Regular movement may help you manage aspects of health that also matter to your kidneys, including blood pressure, weight and blood sugar. It can support how you feel day to day. It should not be sold as a way to force your eGFR upward.
A manageable routine might begin with walking. If you already exercise, talk with your care team about an appropriate level for your health. If you have been unwell, are receiving dialysis, have heart problems or develop symptoms during activity, seek individual advice.
Notice how exercise fits your life. Ten minutes you can repeat is more useful than a demanding schedule you abandon after a week. You can build gradually when it is appropriate for you.
If you have recently done unusually intense exercise before a blood test, mention it when reviewing the result. A clinician can decide whether it is relevant; do not use it to dismiss a fall in eGFR without assessment.
Our article can exercise improve kidney function? explores what activity can and cannot do.
Step 6: Check your medicines and supplements
A medicine review is one of the most useful actions you can take when kidney function changes. Bring a complete list to your appointment, including prescription drugs, over-the-counter painkillers, cold remedies, vitamins and herbal products.
Nonsteroidal anti-inflammatory drugs, or NSAIDs, need particular care. They may harm kidneys in certain situations, especially during dehydration or illness. Ask your pharmacist or clinician about pain relief that is suitable for you rather than choosing or stopping medicines based on a broad internet rule.
If you become ill with vomiting, diarrhea, fever or poor fluid intake, ask your care team in advance what you should do with your medicines and when to seek help. The answer can differ with the medicine and the person.
Be skeptical of supplements that claim to “increase GFR naturally.” Such a claim does not tell you whether the product treats the cause of a low result, works in CKD or is safe alongside your medicines. Bring the full ingredients and dose to a professional review.
Step 7: Ask whether your treatment is protecting your kidneys
Some treatments are intended to reduce the risk of CKD progression in suitable patients. They may be chosen because of your diagnosis, urine albumin, diabetes status, eGFR and other factors.
That is a conversation to have with your prescribing clinician. Ask:
- What is this medicine intended to do for my kidneys?
- What changes in my tests should we expect?
- When will you recheck my blood or urine?
- Which symptoms should I report?
- Should I do anything differently if I become acutely ill?
These questions help you understand your plan without guessing that every change in a number is either a cure or a side effect. Never start, stop or adjust a prescription simply to chase a higher eGFR on the next report.
Want a structured resource while you work on everyday kidney-care habits? You can explore the Kidney Disease Solution program. Your clinician’s treatment and monitoring plan should guide decisions about medicines, supplements, fluid and diet.
What about drinking more water?
This is among the most common questions from people with a low eGFR. More water is not a universal treatment.
If a person has been dehydrated, addressing that problem may affect kidney function and subsequent tests. But the amount of fluid that is right for you depends on your health, including whether you have swelling, heart problems or a prescribed fluid restriction.
Drinking excessively to improve a laboratory number can be a poor decision, particularly if you have been told to limit fluid. On the other hand, ignoring significant vomiting or diarrhea because you fear drinking water also needs medical advice.
Ask your care team for a personal fluid plan. Read how much water a kidney patient should drink for a fuller explanation once that page is live.
Do “GFR-boosting” foods work?
No single food has been shown to reliably restore kidney filtration for everyone with CKD. A good eating plan can still matter a great deal: it can support blood pressure, diabetes care and your nutritional needs.
Instead of searching for the best food to increase eGFR, ask which dietary change would make the biggest difference for your results. If you eat many salty packaged foods, sodium may be a useful place to begin. If your potassium is high, that may require a more specific adjustment. If your appetite is poor, getting enough nutrition could be the priority.
The useful answer may look less exciting than a “top five miracle foods” list. It is also more likely to fit your life. A meal plan should include foods you can obtain, prepare and enjoy repeatedly.
Our guide to foods often promoted for improving GFR examines that question more closely.
Could my eGFR estimate be misleading?
It can sometimes be less accurate for a particular person. The common calculation uses creatinine, and creatinine is influenced by factors beyond filtration, including muscle-related factors. If a result does not fit the rest of your clinical picture, your clinician may consider additional information or tests.
One option in some circumstances is a cystatin C blood test, which can be used to calculate another eGFR estimate. It is not a test everybody must request after one low result. Its value depends on the question your clinician is trying to answer.
If you are confused by an unexpected result, ask: Does this estimate fit my previous tests and urine findings? Would repeating the test or using another measure help?
Avoid paying for repeated tests on your own simply to find the highest number. A sequence ordered and interpreted for a clinical reason is more informative.
How quickly can eGFR change?
There is no single timetable for every person with CKD. An eGFR may change modestly from one measurement to another. A rapid or substantial decline may call for timely investigation. A slower pattern is considered alongside the cause of kidney disease, urine albumin, treatment and other health issues.
This is one reason the dates on your reports matter. “My eGFR is 50” is less informative than “It was close to this level on several tests” or “It was much higher a few weeks ago.” The same number can lead to different next steps depending on the trend.
Do not try to work out your future from a straight line drawn through two results. Ask your clinician how they interpret the pattern and how often they want to repeat testing.
For more on trends, see how quickly GFR can decrease in CKD and when to worry about GFR when those pages are live.
What if my eGFR stays the same?
Stability may be encouraging, particularly when your care team expected a risk of progression. It does not mean you can stop follow-up or prescribed treatment. The habits and medicines in your plan may be part of why your condition is stable.
Look beyond eGFR as well. Is your urine albumin changing? Is blood pressure at the agreed goal? Are you maintaining nutrition and feeling well? Your care team can tell you which measures deserve the most attention.
If the number has stayed similar but you have new symptoms, mention them. If it improves, ask what the improvement means rather than assuming no more care is needed. Consistent follow-up turns individual readings into a useful picture.
What if my eGFR drops after starting a medicine?
Contact the prescriber and ask how they want the result assessed. Some medicines used in kidney care can be accompanied by an initial change in filtration estimates that a clinician expects to monitor. Other changes need investigation.
The details matter: which medicine, what dose, when it was started, your earlier result, other blood tests, symptoms and whether you have been ill. A website cannot decide whether your particular change is expected.
Do not stop a treatment that may be protecting you without speaking with the person who prescribed it. Equally, do not ignore a new result simply because you read that “a dip is normal.” Ask for specific guidance and follow-up timing.
When should I get urgent advice?
Seek prompt medical advice if your kidney result has changed substantially or you have a marked reduction in urine output, rapidly worsening swelling, significant breathlessness or a serious illness that makes it difficult to eat or drink. Follow any urgent instructions attached to your laboratory report.
You may need assessment even without dramatic symptoms. A sudden fall in eGFR is a different situation from an established low result being monitored over time. If you are unsure how quickly to act, call the clinician who ordered the test.
Do not try to treat a concerning new result with a “flush,” fast or supplement before getting advice.
A practical checklist for your next appointment
Take your recent reports and ask the questions most relevant to you:
- What were my last few eGFR results, and is this a meaningful change?
- What is my urine albumin-to-creatinine ratio?
- Do we know why my eGFR is low?
- Could a recent illness or another temporary factor be involved?
- What blood pressure goal should I follow?
- Do I need specific sodium, protein, potassium, phosphorus or fluid advice?
- Are my medicines and supplements appropriate for my kidney function?
- When should I have repeat blood and urine tests?
- Would a kidney dietitian or specialist review help me?
You need not ask all nine in a short visit. Circle the two or three that would most change what you do next. If a relative helps you manage appointments, share the list so both of you hear the same answers.
Putting your plan into daily life
Once you understand your results, choose actions you can repeat. Someone who needs to reduce sodium might begin with the packaged food they eat most often. Someone asked to monitor blood pressure might choose a reliable time and keep a record. Someone whose clinician identified a recent medicine concern might make an updated medicine list.
Give each change a clear purpose. “I am comparing sodium labels because my blood pressure needs better control” is more useful than “I must avoid every food that might affect GFR.” Purpose makes the plan easier to maintain.
It also makes follow-up more meaningful. You and your clinician can review what changed, how your blood pressure or other results responded, and whether your plan needs adjustment. A habit that fits your life is valuable even when the next eGFR does not produce a dramatic jump.
If you feel overwhelmed, start with the single action your care team considers most important. You can build from there.
The bottom line on increasing eGFR
An eGFR result can improve, particularly when a temporary cause of reduced kidney function is identified and treated. With established CKD, the more dependable goal is to protect kidney function, slow decline and address the risks shown by your blood and urine tests.
Find out why the number changed. Review eGFR alongside urine albumin. Work with your team on blood pressure, diabetes if relevant, medicines, nutrition and follow-up. Make everyday changes that support that plan, without expecting a food or supplement to repair every form of kidney damage.
Most of all, do not let the search for a higher number distract you from what the number is for: helping you and your healthcare team make better decisions.
If you would like to look at a structured kidney-health program while developing your own care plan, view the Kidney Disease Solution program. Check any proposed diet or supplement changes with a qualified professional who knows your results.