Raising your eGFR comes down to protecting your kidneys from further damage and managing the conditions that harm them, primarily high blood pressure, high blood sugar, and inflammation. In most cases, you can’t reverse kidney damage that’s already occurred, but you can slow or stop the decline, and in some cases a low eGFR reading doesn’t reflect your true kidney function at all. Understanding both the real strategies and the testing quirks puts you in a much stronger position.
What Your eGFR Number Actually Means
eGFR estimates how well your kidneys filter waste from your blood, measured in milliliters per minute. A normal eGFR is 90 or above. Between 60 and 89 indicates mild loss of function. Below 60 is where chronic kidney disease (CKD) becomes clinically significant: 45 to 59 is mild-to-moderate loss, 30 to 44 is moderate-to-severe, 15 to 29 is severe, and below 15 is kidney failure.
The number is calculated from a blood test, usually creatinine, combined with your age and sex. That calculation works well for most people, but it has blind spots. If you have unusually high muscle mass (creatinine is a byproduct of muscle metabolism), your eGFR can read artificially low. The same is true if you ate a large amount of cooked meat shortly before the test, or if you take creatine supplements. If your doctor suspects your creatinine-based eGFR is inaccurate, a second marker called cystatin C can provide a more reliable picture. KDIGO guidelines specifically recommend cystatin C testing for people at extremes of muscle mass, elderly patients, or anyone whose creatinine result seems inconsistent with their clinical picture. Before pursuing aggressive interventions, it’s worth confirming that your eGFR reading is accurate.
Control Blood Pressure Aggressively
High blood pressure is the single most damaging force on kidney filtering units. Every year of uncontrolled hypertension accelerates eGFR decline. The 2024 KDIGO guidelines recommend that adults with CKD target a systolic blood pressure below 120 mmHg when tolerated. That’s more aggressive than the general population target of below 130, reflecting how sensitive damaged kidneys are to pressure.
For most people, hitting that target requires medication plus lifestyle changes. Reducing sodium intake to under 2,000 mg per day, maintaining a healthy weight, and regular aerobic exercise all contribute meaningfully. If you’re already on blood pressure medication and your readings are consistently above 130 systolic, that’s a conversation worth having with your doctor.
Manage Blood Sugar If You Have Diabetes
Diabetes is the leading cause of kidney disease worldwide. Chronically elevated blood sugar damages the tiny blood vessels in the kidneys, progressively lowering eGFR over years. Research in Diabetes Care found that for people with diabetes and severe CKD, an A1C between 6.7% and 7.1% was the sweet spot for reducing complications. Going above 7.2% increased microvascular damage, but pushing below 6.7% didn’t provide additional benefit and carried its own risks, including dangerous blood sugar lows.
If your A1C is above 7.2% and your eGFR is declining, tighter blood sugar management is one of the most impactful things you can do. This might involve adjusting medications, reducing refined carbohydrate intake, or increasing physical activity.
Adopt a Kidney-Protective Diet
What you eat has a direct, measurable effect on eGFR trajectory. A study published in the Clinical Journal of the American Society of Nephrology found that people who closely followed a Mediterranean-style diet had 50% lower odds of their eGFR dropping below 60 compared to those who didn’t. Each incremental point of adherence to the diet was associated with a 17% reduction in the odds of significant kidney function loss.
The Mediterranean diet emphasizes vegetables, fruits, whole grains, fish, olive oil, and nuts while limiting red meat, processed foods, and added sugars. This pattern is naturally lower in sodium and animal protein, both of which matter for kidney health.
Protein intake deserves special attention. Your kidneys have to work harder to process protein, and excess intake accelerates decline in people with reduced function. For people with an eGFR below 45, guidelines suggest limiting protein to 0.6 to 0.8 grams per kilogram of body weight per day. That means a 150-pound person (68 kg) would aim for roughly 41 to 54 grams of protein daily, considerably less than the average American intake. For people with early-stage CKD and no protein in their urine, staying under 1.0 gram per kilogram per day is generally sufficient. Shifting protein sources from red meat toward fish, eggs, and plant-based options can help as well.
Stop Kidney-Damaging Medications
Several common over-the-counter and prescription drugs directly lower eGFR by altering blood flow within the kidneys or causing inflammation in kidney tissue. The biggest offenders are NSAIDs: ibuprofen, naproxen, and aspirin at high doses. Occasional use in someone with healthy kidneys is fine, but regular NSAID use in someone with reduced eGFR can accelerate damage significantly.
If you’re taking ibuprofen or naproxen regularly for pain, switching to acetaminophen (which is processed by the liver, not the kidneys) is a straightforward way to remove one source of ongoing kidney stress. Some prescription medications also affect kidney blood flow, so a medication review with your pharmacist or doctor can identify anything that might be contributing to your eGFR decline.
Medications That Slow eGFR Decline
A class of drugs originally developed for diabetes, called SGLT2 inhibitors, has shown remarkable kidney-protective effects even in people without diabetes. These medications work by changing how the kidneys handle glucose and sodium, which reduces pressure inside the kidney’s filtering units. Brand names include Farxiga and Jardiance. People taking SGLT2 inhibitors experience a much slower worsening of CKD over time compared to those not taking them. One important detail: these drugs cause a small, expected dip in eGFR during the first few weeks. That initial drop is not a sign of harm and typically stabilizes quickly.
ACE inhibitors and ARBs, two common classes of blood pressure medications, also protect kidney function by reducing pressure within the kidneys. If you have CKD with protein in your urine and aren’t already on one of these, they’re typically a first-line recommendation.
Exercise and Weight Management
Regular physical activity improves eGFR indirectly by lowering blood pressure, improving insulin sensitivity, and reducing inflammation. You don’t need intense exercise. Walking 30 minutes most days, cycling, or swimming all provide meaningful benefit. Excess body weight independently worsens kidney function through increased metabolic demand and inflammation, so reaching a healthier weight, if relevant, compounds the benefits of exercise.
Hydration: Less Complicated Than You’d Think
There’s a popular belief that drinking more water flushes the kidneys and improves function. The evidence doesn’t support this. A study of kidney transplant recipients found no difference in kidney function between those prescribed 4 liters of fluid daily and those prescribed 2 liters. Current expert guidance is straightforward: let thirst guide your fluid intake. Forcing excessive water provides no proven benefit for eGFR and, in advanced CKD where the kidneys can’t excrete fluid efficiently, can actually cause harm.
That said, chronic dehydration is worth avoiding. If your urine is consistently dark yellow, you’re likely not drinking enough. Pale yellow is the practical target.
Why Repeat Testing Matters
A single low eGFR reading isn’t necessarily a diagnosis. Creatinine levels fluctuate based on hydration, recent meals, exercise, and even the time of day. Temporary illness, dehydration, or a large steak dinner the night before blood work can all push your eGFR reading lower than your true kidney function. Two or more readings taken at least 90 days apart give a much clearer picture of whether your kidneys are actually declining or whether you caught a bad snapshot. If your eGFR is borderline (say, 55 to 65) and you have no protein in your urine, there’s a reasonable chance a retest under better conditions will come back higher.