Stage 2 kidney disease means your kidneys still work well, with a filtration rate (eGFR) between 60 and 89, but there are early signs of damage. The good news: at this stage, the right combination of blood pressure control, dietary changes, and medication can slow or even halt progression. Treatment focuses on protecting the kidney function you still have.
What Stage 2 Actually Means
Your kidneys filter waste through tiny clusters of blood vessels. The eGFR number estimates how efficiently they’re doing that job, measured in milliliters per minute. A normal eGFR is 90 or above. At stage 2, yours falls between 60 and 89, which the National Kidney Foundation classifies as “mild loss of kidney function.” You likely feel completely normal, and many people are surprised to learn anything is wrong at all.
The diagnosis also requires some evidence of actual kidney damage, usually protein leaking into your urine (called albuminuria), structural abnormalities on imaging, or a history of kidney-related conditions. A mildly reduced eGFR alone, without any of these markers, doesn’t necessarily mean you have kidney disease. That distinction matters because it determines how aggressively your doctor will treat you.
Blood Pressure Is the Single Biggest Lever
High blood pressure damages the tiny blood vessels in your kidneys, accelerating the loss of function over time. Controlling it is the most impactful thing you can do at stage 2. The 2021 international kidney guidelines (KDIGO) recommend a systolic blood pressure target below 120 mmHg when tolerated. That’s the top number on your reading. Some guidelines allow a slightly higher target of under 140/90 for people without significant protein in their urine, dropping to under 130/80 when protein levels are elevated.
If your blood pressure is above these targets, your doctor will likely prescribe a class of medications that block a hormone system called the renin-angiotensin system. These drugs (commonly known as ACE inhibitors or ARBs) do double duty: they lower blood pressure throughout the body and reduce pressure inside the kidney’s filtering units specifically. That drop in internal pressure cuts down on the amount of protein leaking through, which slows scarring and preserves function over time. They also reduce inflammation that contributes to long-term kidney damage. These medications are generally recommended for anyone with stage 1, 2, or 3 kidney disease who also has diabetes, high blood pressure, or protein in their urine.
When you start one of these medications, expect a small initial dip in your eGFR. This is actually a sign the drug is working. It reflects lower pressure inside the kidney’s filters, not new damage. Your doctor will check your kidney function and potassium levels shortly after starting to make sure the change stays within a safe range.
Blood Sugar Control if You Have Diabetes
Diabetes is the leading cause of kidney disease, and poorly controlled blood sugar accelerates the damage. If you have both conditions, keeping your hemoglobin A1c (a three-month average of blood sugar) in an individualized target range is critical. International kidney guidelines recommend a target somewhere between below 6.5% and below 8.0%, depending on your overall health, life expectancy, and risk of dangerously low blood sugar episodes. For someone with stage 2 disease who is otherwise healthy, the target typically sits at the lower, tighter end of that range.
A newer class of diabetes medications, SGLT2 inhibitors, has become a cornerstone of kidney protection. Two of these drugs received FDA approval specifically to reduce the risk of kidney disease progression, and they work regardless of whether you have diabetes. They lower pressure inside the kidney’s filters through a different mechanism than ACE inhibitors, providing an additional layer of protection. If you have stage 2 kidney disease with risk factors for progression, ask whether one of these medications makes sense for you.
Dietary Changes That Matter Most
At stage 2, you don’t need the strict dietary restrictions that come with advanced kidney disease. But two changes make a measurable difference: reducing sodium and moderating protein.
The National Kidney Foundation recommends that people with kidney disease or high blood pressure limit sodium to around 1,500 mg per day. For context, the average American consumes over 3,400 mg daily, and most of it comes from processed and restaurant foods rather than the salt shaker. Reading nutrition labels, cooking more meals at home, and choosing fresh or frozen vegetables over canned ones are the most practical ways to get there. Lowering sodium intake directly reduces blood pressure, which compounds the benefit of any medication you’re taking.
Protein is a bit more nuanced. Your body breaks protein down into waste products that the kidneys must filter out. Eating excessive amounts forces your kidneys to work harder. Current guidelines suggest 0.8 to 1.0 grams of protein per kilogram of body weight per day for stages 1 through 4. For a 170-pound person, that works out to roughly 62 to 77 grams daily. That’s not a low-protein diet by any means. It’s closer to what most nutrition guidelines already recommend. The key is avoiding the very high protein intake that comes with certain diets or heavy supplement use. If you’re unsure where you fall, tracking your intake for a few days with a food app can be eye-opening.
Medications and Supplements to Be Careful With
Some common over-the-counter pain relievers can harm your kidneys, and at stage 2 you have less margin for error. Non-steroidal anti-inflammatory drugs, better known as ibuprofen (Advil, Motrin), naproxen (Aleve), and topical diclofenac (Voltaren), reduce blood flow to the kidneys and can worsen function over time. High-dose aspirin, above 325 mg per day, carries similar risk. Occasional use for a headache is different from taking these drugs daily for chronic pain, but it’s worth discussing alternatives with your doctor.
Herbal supplements and high-dose vitamins deserve caution too. Many are filtered through the kidneys, and some contain ingredients that can be directly toxic to kidney tissue. The fact that something is “natural” doesn’t mean it’s safe for compromised kidneys.
How Often You’ll Be Monitored
Stage 2 kidney disease doesn’t require constant testing, but you do need regular check-ins to catch any changes early. For most people at this stage, guidelines recommend checking your eGFR and urine protein levels once per year. If you have significant protein in your urine (300 mg/g or higher on the albumin-to-creatinine ratio), that frequency increases to about three times per year because higher protein levels signal a greater risk of progression.
These tests are simple blood and urine samples. Tracking your eGFR over time is more informative than any single reading, because a stable number over several years is reassuring even if it’s below the “normal” threshold. A steady downward trend, on the other hand, signals that your current treatment plan may need adjustment.
Exercise, Weight, and Other Lifestyle Factors
Regular physical activity lowers blood pressure, improves blood sugar control, and helps maintain a healthy weight, all of which protect your kidneys. Aim for at least 150 minutes of moderate activity per week, things like brisk walking, cycling, or swimming. There’s no restriction on exercise type at stage 2.
Carrying excess weight increases the workload on your kidneys and raises the risk of both diabetes and high blood pressure. Even a modest weight loss of 5 to 10 percent of your body weight can produce meaningful improvements in blood pressure and blood sugar. Smoking accelerates kidney damage by constricting blood vessels and promoting inflammation, so quitting provides direct kidney benefits on top of everything else.
Staying well hydrated is sensible, but you don’t need to force excessive water intake. At stage 2, your kidneys still regulate fluid balance effectively. Drinking when you’re thirsty and keeping your urine a pale yellow color is a reasonable guide.