Stage 2: Mildly reduced function

What it means

Stage 2 means your filtration rate is slightly lower than normal — somewhere in the 60 to 89 range — and there are signs of kidney damage (most often protein in the urine or a known structural problem). Without those signs of damage, a GFR in this range by itself doesn’t qualify as CKD; for many older adults it’s simply where their kidneys naturally sit.

Most people at Stage 2 feel completely well. Routine blood work usually looks normal. The kidneys are still managing waste, fluid, and electrolytes with room to spare — there’s just a little less reserve.

What’s happening in your body

Some nephron loss is in the picture, but the remaining ones are absorbing the work easily. The biggest practical implication: stressors like dehydration, certain medications, surgery, or contrast dye carry a bit more risk at this stage than they did when your kidneys had more reserve to fall back on.

What your care team focuses on

• Everything from Stage 1. Treat the cause, lean into blood pressure control, lower sodium, no smoking.
• Cardiovascular risk. CKD and heart disease share many risk factors and amplify each other. Lipids, blood pressure, blood sugar, and weight matter more here than the kidney numbers alone often suggest.
• Medication review. Avoiding routine NSAID use, being careful with herbal supplements that can be hard on the kidneys, and making sure existing medications are dosed correctly for your function.
• ACE inhibitors or ARBsif there’s persistent albuminuria.
• SGLT2 inhibitorsare increasingly used here too, regardless of diabetes status, when there’s protein in the urine.

Questions patients often ask

The short version: many people live a full life at Stage 2 without ever progressing. Stay close to your numbers, lean on your care team, and don’t let a slightly-low GFR rearrange your week.