What Happens When eGFR Drops Below 60

So Your Lab Results Say eGFR — What Does That Even Mean?

eGFR stands for estimated Glomerular Filtration Rate. It measures how well your kidneys are filtering waste out of your blood, expressed in milliliters per minute per 1.73 square meters of body surface area (mL/min/1.73 m²). Not the most intuitive number, but it’s the gold standard for kidney function.

A normal eGFR is above 90. When it drops below 60 and stays there for three months or more, that meets the clinical definition of Stage 3 Chronic Kidney Disease (CKD). And this is the stage where most people first find out they have a kidney problem — often totally by surprise.

The CKD Stages — Quick Reference

• Stage 1 (eGFR 90+): Kidney damage with normal filtration
• Stage 2 (eGFR 60-89): Mild decrease in function
• Stage 3a (eGFR 45-59): Mild to moderate decrease
• Stage 3b (eGFR 30-44): Moderate to severe decrease
• Stage 4 (eGFR 15-29): Severe decrease
• Stage 5 (eGFR below 15): Kidney failure

Stage 3 gets split into 3a and 3b because the outlook and treatment approach are genuinely different. Stage 3a often holds steady for years with proper management. Stage 3b needs closer watch and a more aggressive game plan.

Here’s the Tricky Part: You Might Feel Totally Fine

One of the biggest challenges with Stage 3 CKD is that many people have zero symptoms. Your kidneys have a lot of reserve capacity, so things can feel normal even when function is declining. But some people do start noticing:

• Fatigue and low energy that won’t go away
• Swelling in the hands, feet, or ankles (edema)
• Foamy urine or getting up more at night to pee
• Mild nausea or not wanting to eat
• Trouble concentrating
• Muscle cramps — especially at night
• Dry, itchy skin

These symptoms overlap with a dozen other conditions, which is exactly why blood tests measuring creatinine and calculating eGFR are so important for an accurate diagnosis.

What Causes eGFR to Drop in the First Place?

The two biggest culprits are diabetes and high blood pressure. Together, they account for roughly two-thirds of all CKD cases. But there’s a longer list:

• Glomerulonephritis (inflammation of the kidney’s filtering units)
• Polycystic kidney disease (genetic)
• Long-term NSAID use — ibuprofen, naproxen, that sort of thing
• Recurrent kidney infections
• Blockages from kidney stones or enlarged prostate
• Autoimmune conditions like lupus

Worth noting: temporary dips in eGFR can also happen from dehydration, certain medications, or an acute illness. One low reading doesn’t automatically mean CKD. Your doctor will retest to confirm it’s persistent before making the diagnosis.

You Can Slow This Down — Don’t Skip This Section

The single most important thing to know about Stage 3 CKD: progression is not inevitable. Many people maintain stable kidney function for decades with the right approach.

Blood Pressure Is Priority #1

Keeping blood pressure below 130/80 mmHg is the single most effective way to protect your remaining kidney function. ACE inhibitors and ARBs are the go-to blood pressure medications for CKD patients because they reduce pressure inside the kidney’s filtering units. You can track your readings with our Blood Pressure Calculator.

Blood Sugar Control (If You Have Diabetes)

Keeping your A1C below 7% makes a significant difference in slowing kidney damage. Even small improvements matter. Use our A1C Calculator to make sense of your numbers.

Diet Changes That Actually Help

When eGFR drops below 60, what you eat starts to matter a lot more:

1. Cut sodium to under 2,000 mg daily. This helps with blood pressure and reduces fluid retention. (Read labels — sodium hides everywhere.)
2. Watch your protein intake. Too much protein creates extra waste your kidneys have to filter. Most nephrologists recommend 0.6 to 0.8 grams per kilogram of body weight per day at Stage 3.
3. Keep an eye on potassium and phosphorus if your blood levels are running high. Your doctor will check these regularly.
4. Stay hydrated — but don’t overdo it. Your nephrologist will tell you the right amount for your specific situation.

Medications That Can Make Things Worse

Certain drugs can speed up kidney damage — and some are things people take without a second thought:

• NSAIDs (ibuprofen, naproxen, high-dose aspirin) — they reduce blood flow to the kidneys
• Some antibiotics can be toxic at standard doses when your eGFR is reduced
• Proton pump inhibitors (omeprazole, pantoprazole) — linked to CKD progression with long-term use
• CT scan contrast dye — can cause acute kidney injury when eGFR is already low

Tell every doctor and pharmacist about your kidney function before starting anything new. That includes over-the-counter drugs and supplements. Don’t assume something is safe just because it’s sold without a prescription.

What Happens at Follow-Up Visits

If you’re in Stage 3a (eGFR 45-59), expect lab rechecks every 6 to 12 months. Stage 3b (eGFR 30-44) means monitoring every 3 to 6 months.

Standard follow-up labs include a metabolic panel, urine test for protein, CBC to check for anemia, plus phosphorus and parathyroid hormone levels. Your nephrologist uses all of this to catch complications early — before they become big problems.

When Do You Need a Kidney Specialist?

Your primary care doctor may refer you to a nephrologist if your eGFR falls below 45, drops quickly, or comes with significant protein in your urine. Early referral is linked to better outcomes and — if dialysis is ever needed — a longer time before you get there.

Look, an eGFR below 60 is a signal to take action. It’s not a reason to panic. With proper blood pressure control, blood sugar management, diet tweaks, and regular monitoring, many people with Stage 3 CKD keep stable function for the rest of their lives.