Kidney and Diabetes: 11 Vital Facts That Protect You

Diabetes and kidney health are closely connected.

In fact, diabetes is one of the most important causes of chronic kidney disease.

Current U.S. data estimate that about 4 in 10 adults with diabetes have chronic kidney disease.

There is another problem.

Early kidney disease can be silent.

You may feel normal.

You may urinate normally.

You may have no pain.

Kidney damage can still be present.

That is why the relationship between kidney and diabetes is not only about symptoms.

It is about testing.

It is about blood sugar.

It is about blood pressure.

It is about medicines that can protect the kidneys.

It is also about acting early.

This guide explains 11 vital facts about diabetic kidney disease, including the latest 2026 screening and treatment guidance.

For broader kidney education, visit the NextFitLife Kidney Health and Disease Hub.

Quick Answer: How Does Diabetes Affect the Kidneys?

High blood glucose can damage the tiny blood vessels and filtering structures inside the kidneys.

High blood pressure can add more damage.

Over time, the kidneys may begin leaking albumin into urine and may lose some of their ability to filter blood.

This is called diabetic kidney disease or diabetic nephropathy.

The two main tests used to find it are:

• eGFR, a blood-based estimate of kidney filtration
• UACR, a urine test that checks for albumin leakage

Do not wait for symptoms.

Current diabetes guidance recommends regular kidney screening because early treatment can help slow kidney damage.

1. Diabetes Is One of the Biggest Kidney Disease Risks

Diabetes can affect almost every blood vessel in the body.

The kidneys contain many tiny blood vessels.

They also contain millions of microscopic filtering units called nephrons.

High blood glucose over time can damage these structures.

The kidneys may then become less effective at filtering waste and extra fluid.

They may also begin leaking a protein called albumin into the urine.

This is one reason diabetes is a major cause of chronic kidney disease.

Current CDC data estimate that about 38 percent of U.S. adults with diabetes have CKD.

That is close to 4 in 10.

Both type 1 and type 2 diabetes can cause kidney damage.

The longer a person lives with diabetes, the more important kidney monitoring becomes.

2. Diabetic Kidney Disease Can Develop Without Symptoms

This may be the most important fact in the whole article.

Early diabetic kidney disease often causes no symptoms.

You may feel well.

Your urine may look normal.

You may have normal energy.

You may have no swelling.

You may have no kidney pain.

That does not prove your kidneys are normal.

Waiting for symptoms can mean waiting until kidney disease is more advanced.

The safest approach is regular testing when you have diabetes.

For a broader explanation of symptoms and testing, read our Kidney Disease Symptoms, Tests, Prevention, and Red Flags guide.

3. eGFR and UACR Are the Two Key Kidney Tests

A normal-looking urine sample cannot tell you enough about kidney health.

Two tests work together.

eGFR

eGFR means estimated glomerular filtration rate.

It estimates how effectively your kidneys filter blood.

It is usually calculated using a blood creatinine result.

Lower eGFR can mean reduced kidney filtration.

UACR

UACR means urine albumin to creatinine ratio.

It checks for albumin leaking into urine.

This is important because albumin leakage can appear before eGFR falls.

Why Both Matter?

You can have significant albumin in urine while eGFR still looks fairly normal.

You can also have reduced filtration with less albumin leakage.

This is why a complete kidney disease screening plan usually uses both numbers.

Visit the Medical Tests and Screenings Hub for more information about health testing.

4. Type 1 and Type 2 Diabetes Have Different Screening Timelines

Current American Diabetes Association guidance is clear.

Type 2 Diabetes

People with type 2 diabetes should have UACR and eGFR checked at least once each year.

This starts regardless of which diabetes treatment is being used.

Why so early?

Type 2 diabetes can exist for years before diagnosis.

Kidney changes may already be present when diabetes is discovered.

Type 1 Diabetes

People with type 1 diabetes should begin annual UACR and eGFR screening after they have had diabetes for five years.

Once CKD Is Present

People who already have CKD may need kidney monitoring one to four times each year.

The frequency depends on the level of kidney function, albuminuria, treatment, and risk of progression.

Your healthcare team should set the schedule.

5. Blood Sugar Control Helps Protect the Kidneys

High glucose over time can damage kidney blood vessels and filters.

This is why managing blood sugar and kidneys together matters.

A1C gives an estimate of average glucose over the previous two to three months.

But there is no one perfect A1C goal for every person.

Your target should consider:

• Age
• Type of diabetes
• Risk of low blood sugar
• Heart disease
• Kidney disease
• Medicines
• Pregnancy
• Other health conditions

Work with your healthcare team to choose a safe target.

Do not try to force glucose extremely low in the hope of repairing kidney damage.

Severe hypoglycemia can be dangerous.

For broader diabetes guidance, visit the Diabetes and Blood Sugar Management Hub.

6. Blood Pressure, Cholesterol, and Heart Health Matter Too

Diabetes rarely affects the kidneys in isolation.

Many people with diabetes also have high blood pressure.

High blood pressure can damage the small blood vessels inside the kidneys.

Kidney disease can then make blood pressure harder to control.

This creates a harmful cycle.

Your healthcare team may ask you to monitor:

• Blood pressure
• Cholesterol
• Blood glucose
• A1C
• eGFR
• UACR

Your personal blood pressure goal depends on your health.

Do not use one internet number as the correct target for every person with diabetes.

Heart health deserves attention too.

Diabetes plus CKD significantly increases cardiovascular risk.

Learn more in the Heart and Cardiovascular Health Hub.

7. Modern Medicines Can Protect More Than Blood Sugar

This is one of the biggest updates in diabetes and kidney care.

Some medicines now have strong evidence for protecting kidney and cardiovascular health.

ACE Inhibitors and ARBs

ACE inhibitors and ARBs are blood pressure medicines.

They can be especially useful when diabetes, hypertension, and albuminuria occur together.

ACE inhibitor names often end in pril.

ARB names often end in sartan.

They can reduce albumin leakage and slow kidney damage in appropriate patients.

These medicines require monitoring of kidney function and potassium.

SGLT2 Inhibitors

SGLT2 inhibitors have changed kidney care.

They were first developed as glucose lowering medicines.

Research now shows important kidney and heart benefits that go beyond their effect on blood sugar.

Current 2026 ADA guidance recommends an SGLT2 inhibitor with proven benefit for many people who have type 2 diabetes and CKD.

They can reduce the risk of CKD progression and cardiovascular events.

They are not appropriate for everyone.

Your eGFR, medicines, infection risk, fluid status, and overall health matter.

GLP 1 Receptor Agonists

GLP 1 receptor agonists can support glucose management and weight management.

Some also have proven cardiovascular and kidney benefits.

Current guidance recommends GLP 1 treatment with demonstrated benefit for many people with type 2 diabetes and CKD.

Finerenone

Finerenone is a nonsteroidal mineralocorticoid receptor antagonist.

It can lower kidney and cardiovascular risk in selected people with type 2 diabetes, CKD, and albuminuria.

Potassium and kidney function must be monitored.

These medicines are not supplements.

They are prescription treatments that need professional selection and monitoring.

8. A Diabetes and Kidney Diet Must Fit Both Conditions

Once kidney disease develops, food advice can become more complicated.

A normal diabetes meal plan may need adjustments.

A generic renal diet may also be wrong for you.

The safest plan depends on:

• eGFR
• UACR
• Blood potassium
• Blood phosphorus
• Blood glucose
• Blood pressure
• Medicine
• Body weight
• Urine output
• Dialysis status

A person with mild CKD and normal potassium may be able to eat many fruits, vegetables, beans, and whole grains.

A person with advanced CKD and high potassium may need a different plan.

A person receiving dialysis often needs more protein than someone with CKD who is not receiving dialysis.

Do not copy another person's renal diet.

Read our complete Diet for Kidney Disease guide.

9. Daily Habits Still Have a Major Role

Medicine does not replace healthy habits.

And healthy habits do not replace medicine when medicine is needed.

The two work together.

Useful habits include:

• Eat less sodium
• Choose more whole foods
• Eat vegetables and whole fruit when they fit your kidney plan
• Stay physically active
• Work toward a suitable body weight
• Do not smoke
• Get enough sleep
• Keep alcohol exposure low
• Take medicines correctly
• Keep medical appointments

Avoid extreme diets.

Very high protein diets may not be suitable once CKD develops.

Very low carbohydrate diets can also require medicine changes in people using insulin or other glucose lowering medicines.

Diet changes should be coordinated with your diabetes and kidney treatment.

10. Common Medicines and Serious Illness Can Stress the Kidneys

Kidneys help remove many medicines from the body.

Kidney disease can change how medicines behave.

This means a medicine review is important.

NSAID Pain Medicines

NSAIDs include medicines such as:

• Ibuprofen
• Naproxen
• Diclofenac

These medicines can reduce blood flow through the kidneys.

Risk can increase with dehydration, older age, CKD, heart failure, or certain medicine combinations.

Dehydration and Illness

Vomiting, diarrhea, fever, severe infection, and poor fluid intake can strain kidney function.

They can also make diabetes harder to control.

Ask your healthcare team for a sick day plan.

Some diabetes or blood pressure medicines may require special instructions during serious dehydration or before certain procedures.

Do not stop prescription medicine without professional advice.

11. Advanced Kidney Disease Needs Specialist Care

Not every person with diabetes and CKD needs a nephrologist immediately.

But specialist kidney care becomes more important when disease is advanced or progressing quickly.

Current ADA guidance recommends considering nephrology referral when:

• eGFR keeps falling
• UACR keeps rising
• The cause of kidney disease is unclear
• Blood pressure is difficult to control
• Electrolyte problems develop
• Kidney complications become difficult to manage
• eGFR falls below about 30 mL/min/1.73 m²

Very advanced kidney disease can lead to kidney failure.

Treatment options can include dialysis or kidney transplantation.

Most people with diabetes and kidney disease do not suddenly move from normal kidney function to dialysis.

CKD usually develops over time.

That creates an important opportunity to test, treat, and protect kidney function earlier.

Understanding Your Kidney Numbers

UACR Below 30 mg/g

This is generally considered normal to mildly increased albumin excretion.

UACR 30 to 299 mg/g

This is considered moderately increased albuminuria.

UACR 300 mg/g or Higher

This is considered severely increased albuminuria.

One high UACR does not always prove chronic kidney damage.

Exercise, infection, fever, very high glucose, heart failure, and very high blood pressure can temporarily raise urine albumin.

Because UACR varies, repeat testing is often needed.

Current ADA guidance advises that two of three samples collected over three to six months should be abnormal before persistent moderately or severely increased albuminuria is diagnosed.

eGFR Below 60

An eGFR that stays below 60 mL/min/1.73 m² can be a sign of CKD.

One low result should be interpreted in context.

Chronic kidney disease generally means reduced kidney function or another marker of kidney damage that persists over time.

What Are the Symptoms of Diabetic Kidney Disease?

Early disease may cause no symptoms.

As kidney function worsens, possible signs can include:

• Foamy urine
• Swollen feet or ankles
• Puffiness around the eyes
• Changes in urination
• Tiredness
• Weakness
• Poor appetite
• Nausea
• Itching
• Muscle cramps
• Shortness of breath
• Blood pressure that becomes harder to control

These symptoms are not specific to kidney disease.

Testing is needed to determine the cause.

Seek Urgent Medical Care For

• Inability to urinate
• Very little urine during serious illness
• Severe shortness of breath
• Chest pain
• Confusion
• Fainting
• Rapidly worsening swelling
• Severe weakness
• Repeated vomiting with dehydration

What Should You Eat if You Have Diabetes and Kidney Disease?

There is no single menu for everyone.

In general, your plan may focus on blood glucose control, lower sodium, suitable carbohydrate portions, and the right amount of protein.

Potassium and phosphorus do not need automatic restriction in every person with CKD.

Your laboratory results matter.

Choose More Whole Foods

When they fit your personal kidney plan, meals may include:

• Vegetables
• Whole fruit
• Whole grains
• Beans
• Lentils
• Nuts
• Seeds
• Fish
• Eggs
• Tofu
• Unsaturated fats

Watch Sodium

High sodium intake can make blood pressure and fluid control harder.

Processed meat, instant meals, salty snacks, restaurant meals, sauces, and packaged soups can contain large amounts.

Watch Sugary Drinks

Sugary drinks can make glucose control more difficult.

Water is a simple choice for many people.

But people with advanced kidney disease or heart failure may need a fluid limit.

Do Not Start a Very Low Protein Diet Alone

Current guidance supports individualized protein intake.

Eating too much protein may be unhelpful for some people with CKD.

Eating too little can cause muscle loss and poor nutrition.

Work with a registered dietitian when possible.

Does Drinking More Water Protect Diabetic Kidneys?

Water is important.

But water is not a treatment for diabetic nephropathy.

Forcing large amounts of water will not wash albumin out of urine or raise a chronically low eGFR.

Fluid needs depend on your health.

People with advanced CKD, heart failure, major swelling, dialysis, or low urine output may need a fluid restriction.

Choose balanced hydration rather than a kidney flush.

Does Kidney Disease Cause Diabetes?

Diabetes is a major cause of kidney disease.

The reverse relationship is more complicated.

CKD can affect insulin metabolism and glucose control.

Advanced kidney disease can also increase the risk of low blood sugar because the kidneys help clear insulin and some diabetes medicines.

This means diabetes treatment may need adjustment as kidney function changes.

Do not assume worsening kidney function simply causes ordinary type 2 diabetes.

The relationship should be evaluated by your healthcare team.

Can Diabetic Kidney Disease Be Reversed?

Chronic kidney damage is often not fully reversible.

But that does not mean treatment is useless.

Albuminuria can sometimes improve.

Kidney function can remain stable for long periods.

Modern treatment can reduce the risk of kidney failure and cardiovascular events.

The goal is to protect the kidney function you still have.

That is why early testing matters.

A Simple Daily Kidney and Diabetes Protection Plan

Morning

Take prescribed medicines correctly.

Check glucose or use your glucose monitor as directed.

Check blood pressure when your care team has asked you to monitor it at home.

Meals

Choose sensible carbohydrate portions.

Use less sodium.

Add vegetables and whole foods that fit your kidney plan.

Movement

Move your body most days.

A short walk after a meal can be a simple starting point when it is safe for you.

Evening

Review unusual glucose readings.

Take evening medicine as prescribed.

Prepare for enough sleep.

Throughout the Year

Keep your diabetes appointments.

Know when your next A1C, eGFR, and UACR tests are due.

Questions to Ask Your Healthcare Team

1. What is my latest eGFR?
2. What is my latest UACR?
3. How often should these tests be repeated?
4. What is my personal A1C goal?
5. What is my blood pressure goal?
6. Do I have albuminuria?
7. Would an ACE inhibitor or ARB help me?
8. Would an SGLT2 inhibitor be appropriate?
9. Would a GLP 1 medicine help my kidney or cardiovascular risk?
10. Is finerenone appropriate for me?
11. Do any of my medicines need a kidney dose adjustment?
12. Should I avoid NSAID pain medicines?
13. Do I need to limit potassium or phosphorus?
14. What is the right protein intake for me?
15. Should I see a renal dietitian?
16. When should I see a nephrologist?

References and Sources

1. American Diabetes Association: Chronic Kidney Disease and Risk Management, Standards of Care in Diabetes 2026
   Current guidance covering annual UACR and eGFR screening, CKD diagnosis, blood pressure, ACE inhibitors and ARBs, SGLT2 inhibitors, GLP 1 receptor agonists, finerenone, monitoring, and nephrology referral.
   Read the ADA 2026 kidney standards
2. Centers for Disease Control and Prevention: Diabetes and Chronic Kidney Disease
   Explains how diabetes damages the kidneys, CKD risk, kidney testing, glucose management, blood pressure, cholesterol, nutrition, movement, and medicines.
   Read the CDC diabetes and CKD guide
3. National Institute of Diabetes and Digestive and Kidney Diseases: Diabetic Kidney Disease
   Explains how diabetes causes kidney damage, risk factors, symptoms, blood and urine testing, glucose control, blood pressure, lifestyle, and treatment.
   Read the NIDDK diabetic kidney disease guide
4. National Kidney Foundation: Preventing Diabetic Kidney Disease
   Provides patient education about diabetic kidney disease, kidney testing, glucose management, blood pressure treatment, SGLT2 inhibitors, and kidney failure treatment.
   Read the National Kidney Foundation guide
5. KDIGO: Diabetes Management in Chronic Kidney Disease
   Provides international evidence-based kidney guidance. KDIGO notes that its 2022 diabetes and CKD guideline remains the current published guideline while its updated guideline is under development.
   Read the KDIGO diabetes and CKD guidance

Conclusion: Protect the Kidney and Diabetes Connection Early

The connection between kidney and diabetes deserves attention long before symptoms appear.

Diabetes can slowly damage the kidneys.

But early testing and modern treatment give you ways to act.

Know your eGFR.

Know your UACR.

Work toward your glucose and blood pressure goals.

Eat less sodium.

Stay active.

Avoid smoking.

Use medicines safely.

And ask whether kidney protective treatment is right for you.

Your action today: If you have type 2 diabetes, check when you last had both an eGFR blood test and a UACR urine test. If you have type 1 diabetes and have had it for five years or longer, ask your healthcare professional the same question.

Continue Reading on NextFitLife

Use these NextFitLife resources to learn more about kidney and diabetes, kidney testing, nutrition, prevention, and blood sugar management.

• Kidney Health and Disease Hub
• Diabetes and Blood Sugar Management Hub
• Kidney Disease Symptoms, Tests, Prevention, and Red Flags
• Kidney Disease Prevention
• Healthy Kidneys: How to Know and Protect Them
• Diet for Kidney Disease: Foods and Safer Eating
• Foods for Healthy Kidneys
• Renal Glycosuria: Causes, Diagnosis, and Care
• Heart and Cardiovascular Health Hub
• Medical Tests and Screenings Hub
• Nutrition and Vitamins Hub