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Kidney Function Test (KFT): Parameters, Normal Range, Uses, and Price
Kidney
Tue Aug 18 2026
Key Takeaways
- Kidney Function Test (KFT): A group of tests used to assess kidney health and function
- KFT includes: Creatinine, urea, uric acid, electrolytes, eGFR and other parameters, depending on the profile
- Common uses: Screening, monitoring diabetes or blood pressure, assessing kidney disease risk, and reviewing values outside the reference range.
- Sample required: Usually blood; urine may also be required in selected cases
- Fasting requirements: Not always, but follow the instructions given by your doctor or diagnostic centre
Your kidneys do a lot more than you may realise, and most of it happens quietly in the background. A Kidney Function Test, also known as a KFT, is a simple way to check how well these hard-working organs are doing. Whether it is part of a routine health check-up, advised for diabetes or blood pressure monitoring, or suggested to understand certain symptoms better, a KFT can offer useful insights into your kidney health. In this article, we will walk you through what the test includes, how it is done, how to read the normal range, when it may be needed, and what factors can affect the test price.
What is a Kidney Function Test?
A Kidney Function Test (KFT), also commonly referred to as kidney profile test or kidney function profile, is a diagnostic test profile used to assess how efficiently the kidneys are filtering waste from the blood. It refers to a group of multiple kidney-related parameters that are checked together to give a broader view of kidney health.
KFT is commonly done through a blood sample and may include urine-based tests in selected cases. In some cases, urine-based tests may also be recommended to understand how the kidneys are handling waste and protein.
A Kidney Function Test is not only advised when kidney disease is suspected. It may also be recommended for people with diabetes, high blood pressure, swelling, urinary changes, or those taking medicines that may affect kidney function.
What are the Parameters Tested in a Kidney Function Test?
If you are wondering what tests are done to check kidney function, the exact test list may vary depending on the lab, doctor’s advice, symptoms, and medical history. However, most KFT profiles include important blood markers that help assess filtration, waste removal, and electrolyte balance.
Common Kidney Function Test (KFT) Parameters
| KFT Parameter | What It Helps Assess |
| Serum Creatinine Test | Measures creatinine, a waste product filtered by the kidneys |
| Urea / Blood Urea Nitrogen | Checks waste formed from protein breakdown |
| Uric Acid | Helps assess uric acid levels, which may be linked to kidney or metabolic concerns |
| eGFR | Estimates how well the kidneys are filtering blood |
| Sodium | Helps assess fluid and electrolyte balance |
| Potassium | Important for kidney, heart and muscle function |
| Chloride | Helps evaluate fluid and acid-base balance |
| Calcium and Phosphorus | May be included to assess mineral balance |
| Urea Random Urine Test | May be advised to check urea levels in urine |
| Urea, 24-Hour Urine Test | Measures urea excretion over a full day in selected cases |
A kidney function test (KFT) includes different parameters depending on whether it is a basic or advanced profile. Some people may also be advised additional tests such as urine routine examination, urine protein test, ultrasound, or a Nephrotic syndrome gene panel test, depending on symptoms and clinical findings.
What Does KFT Include and Not Include?
| KFT Can Help Assess | KFT May Not Directly Confirm |
| Kidney filtration efficiency | Exact cause of kidney damage |
| Creatinine and urea levels | Kidney stones in every case |
| Electrolyte balance | Structural kidney abnormalities |
| eGFR estimate | Genetic kidney disorders |
| Waste levels in blood | Stage or type of kidney disease without further evaluation |
Depending on the report, your doctor may suggest additional tests such as urine routine examination, urine protein test, ultrasound, serum creatinine test, urea random urine test, Urea, 24-Hour Urine Test, or specialised tests.
Is KFT a Blood Test or a Urine Test?
A kidney function test (KFT) is commonly done as a blood test. The KFT blood test checks levels of creatinine, urea, uric acid, electrolytes and other kidney-related markers in the blood. These values help doctors understand whether the kidneys are clearing waste efficiently.
In some cases, urine tests may also be advised. For example, a Urea Random Urine Test or Urea, 24-Hour Urine Test may be recommended when doctors need additional information about waste excretion, protein loss, or kidney function over time.
How is the Kidney Function Test Done?
If you are searching for ‘how to test kidney function’ or ‘how is a kidney function test done?’, the process is usually simple and quick.
A trained phlebotomist collects a small blood sample from a vein, usually from the arm. The sample is then sent to the laboratory for testing. If a urine sample is required, you may be asked to provide a random urine sample or collect urine over 24 hours, depending on the test prescribed.
Preparation Required Before KFT
Preparation for a KFT is usually simple. However, you should follow the instructions given by your doctor or diagnostic centre.
- Fasting is not always required for KFT, unless advised.
- Drink water normally, unless you have been told to restrict fluids.
- Inform your doctor about ongoing medicines or supplements.
- Avoid intense exercise before the test if advised, as it may affect some values.
- For a 24-hour urine test, follow the collection instructions carefully.
- Do not stop any prescribed medicine without medical advice.
KFT Normal Range: How to Read Your Report
The KFT normal range helps compare your results with general reference values. However, the kidney function test normal range may vary slightly depending on the laboratory, testing method, age, sex, body size, hydration status and medical history.
The values below are general reference ranges. Your test report should always be reviewed by a doctor, especially if any value is high, low, or marked abnormal.
KFT Normal Range Chart
| Parameter | General Normal Range | What Abnormal Results May Suggest |
| Serum Creatinine | Men: around 0.7–1.3 mg/dL; Women: around 0.5–1.1 mg/dL | Reduced kidney filtration, dehydration, muscle mass-related variation or other factors |
| Blood Urea Nitrogen / Urea | Around 6–24 mg/dL, depending on lab range | Dehydration, high protein intake, kidney concerns or other causes |
| Uric Acid | Varies by age and sex | Gout risk, kidney stone risk or metabolic factors |
| Sodium | Around 135–145 mmol/L | Fluid or electrolyte imbalance |
| Potassium | Around 3.5–5.0 mmol/L | Kidney function issues, medicine effect or electrolyte imbalance |
| eGFR | Usually above 90 mL/min/1.73 m² is considered healthy in many adults | Lower values may suggest reduced filtration, but must be interpreted with age and other findings |
Note: Reference ranges may vary by laboratory. Please refer to the range mentioned on your Manipal TRUtest report.
The KFT normal range is only one part of the report interpretation. Kidney function test normal values should be understood along with symptoms, medical history, urine findings, previous reports and the doctor’s evaluation.
How to Understand Your Kidney Function Test (KFT) Report?
A KFT report may look technical, but a few simple points can help you understand it better.
- Creatinine, urea and eGFR are usually interpreted together.
- A single abnormal value does not always confirm kidney disease.
- Dehydration, diet, medicines, exercise and muscle mass can affect results.
- eGFR helps estimate how efficiently the kidneys are filtering blood.
If kidney function test results are abnormal, your doctor may advise repeat testing or additional investigations.
Do not self-diagnose based only on a KFT report. Always speak to a doctor if your results are outside the reference range.
What Do High or Abnormal Results Mean?
High or abnormal results in KFT may suggest changes in kidney filtration, hydration status, electrolyte balance or other health factors. However, abnormal values do not always mean kidney failure.
High creatinine may be linked to reduced kidney filtration, dehydration, high muscle mass, certain medicines, or other health conditions. High urea may occur due to dehydration, increased protein intake, kidney-related concerns or other medical factors. Low eGFR may suggest reduced kidney filtration, especially if it remains low over time.
Your doctor may compare your kidney function test report with previous results, urine tests, blood pressure, diabetes status, medicine history, and symptoms before reaching a conclusion.
What are the Uses of the Kidney Function Test?
A Kidney Function Test is used for screening, diagnosis support and monitoring. It helps doctors assess how well the kidneys are performing important functions.
Common uses of the kidney function test include:
- Routine kidney health screening
- Monitoring people with diabetes
- Monitoring people with high blood pressure
- Assessing the impact of certain medicines on the kidneys
- Evaluating symptoms such as swelling, fatigue or urinary changes
- Monitoring known kidney disease
- Follow-up after abnormal urine or blood reports
- Pre-surgery or pre-treatment assessment in selected cases
A kidney function profile may also be part of a preventive health check-up, especially for people with risk factors for kidney disease.
When Should You Get a Kidney Function Test Done?
You may consider a KFT, if you have symptoms or risk factors that may affect kidney health.
A doctor may advise a Kidney Function Test if you have:
- Swelling in the feet, ankles, hands or face
- Frequent urination or reduced urination
- Foamy or blood-tinged urine
- Persistent fatigue or weakness
- High blood pressure
- Diabetes
- Family history of kidney disease
- Recurrent urinary problems
- Long-term use of medicines that may affect kidney function
- Existing kidney disease that needs monitoring
Timely testing can help detect changes early and support better medical decision-making.
Kidney Function Test (KFT) Price: What Factors Affect the Cost?
The price of kidney function test may vary depending on the city, diagnostic centre, number of parameters included and whether home sample collection is selected. The KFT blood test price may also differ if the test is booked as a standalone test or as part of a health package.
Common factors that affect the kidney function test price include:
- Location or city
- Diagnostic centre or lab
- Basic or advanced KFT list
- Home collection availability
- Whether urine tests are included
- Report turnaround time
- Preventive health package inclusion
- Offers or online booking options
Before booking, it is useful to check what KFT includes and whether the listed price covers all required parameters. At Manipal TRUtest, the focus is on making quality diagnostics more accessible, affordable, accurate and transparent for everyone.
What are the Next Steps After a Kidney Function Test?
After receiving your kidney function test results, the next step is to review the report with a qualified doctor. Even if only one value is abnormal, it should be understood in context.
Your doctor may advise:
- Repeat KFT after a few days or weeks
- Serum Creatinine Test for follow-up
- Urine routine or urine protein test
- Urea Random Urine Test or Urea, 24-Hour Urine Test
- Blood pressure and diabetes monitoring
- Kidney ultrasound
- Medicine review
- Diet and lifestyle changes
- Referral to a specialist, if needed
If there is a suspected inherited or complex kidney condition, specialised tests such as a Nephrotic syndrome gene panel test may be considered in selected cases.
Take the First Step Towards Better Kidney Health
A Kidney Function Test helps assess key kidney health parameters such as creatinine, urea, electrolytes and eGFR. However, the results should always be interpreted with medical guidance, as factors such as age, hydration, medicines, diet and medical history can influence the report. If your KFT report shows abnormal values, consult a doctor to understand the cause and the right next steps.
For those advised to get tested, Manipal TRUtest offers Fast, Accurate, and Reliable diagnostics backed by advanced technology, quality processes, home collection, timely reports and affordable pricing. You can create a free account to book your Kidney Function Test online, manage appointments, access reports and receive updates. Alternatively, you can book the test via Whatsapp. To find a Manipal TRUtest centre near you, click here. For assistance, email us at contact info@manipaltrutest.com, call +91 989 210 1616, or visit our contact form.
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Early Signs of Kidney Problems in Diabetic Patients
Diabetes is a chronic metabolic disorder that affects millions worldwide. While managing blood sugar levels is crucial for overall health, diabetic patients are particularly vulnerable to complications affecting vital organs. Among these, kidney problems, or diabetic nephropathy, represent a significant cause of morbidity and mortality. Early identification of kidney issues in diabetic individuals is essential to prevent progression to chronic kidney disease (CKD) or even kidney failure. Understanding the early signs of kidney problems can empower patients to seek timely medical intervention and safeguard their health.
Why Are Diabetic Patients at Risk?
High blood glucose levels over time damage the delicate blood vessels in the kidneys, impairing their ability to filter waste and excess fluids from the blood. This damage can lead to the gradual loss of kidney function. Diabetic nephropathy is one of the leading causes of end-stage renal disease globally, making it imperative for diabetic patients to monitor their kidney health regularly.
Early Signs of Kidney Problems in Diabetic Patients
Recognizing early symptoms can be challenging because kidney damage initially may not produce noticeable signs. However, certain subtle changes often indicate emerging kidney dysfunction:
- Proteinuria (Presence of Protein in Urine):
One of the earliest indicators of kidney damage is the leakage of protein, primarily albumin, into the urine. Healthy kidneys retain protein, but when damaged, they allow it to pass into urine, known as albuminuria or microalbuminuria. This sign often goes unnoticed without proper testing, but it is a critical marker for diabetic nephropathy.
- Swelling (Edema):
As kidney function declines, excess fluid may accumulate in the body, causing swelling, especially in the hands, feet, ankles, or around the eyes. This puffiness is a sign that the kidneys are struggling to maintain the body’s fluid and electrolyte balance.
- Fatigue and Weakness:
Reduced kidney function can lead to the buildup of waste products and toxins in the bloodstream, resulting in feelings of fatigue, weakness, and lack of energy. These symptoms might also be linked to anemia, which is common in kidney disease.
- Changes in Urination Patterns:
Diabetic patients may notice alterations in their urinary habits, such as increased frequency, especially at night (nocturia), foamy urine due to protein presence, or difficulty urinating. Such changes warrant prompt medical evaluation.
- Elevated Blood Pressure:
High blood pressure and kidney problems often coexist and exacerbate each other. Uncontrolled hypertension can both cause and worsen kidney damage, making blood pressure monitoring vital in diabetics.
Importance of Regular Screening
Since early kidney damage often lacks obvious symptoms, regular screening is the cornerstone of prevention. Diabetic patients should undergo annual tests to check for microalbuminuria and kidney function parameters such as serum creatinine and estimated glomerular filtration rate (eGFR). Early detection through these tests allows for timely interventions, including medication adjustments, lifestyle changes, and strict blood sugar and blood pressure control.
Preventive Measures and Management
To reduce the risk or slow the progression of kidney disease, diabetic patients should:
- Maintain optimal blood sugar levels through diet, exercise, and medication adherence.
- Monitor and control blood pressure meticulously.
- Avoid nephrotoxic substances like excessive NSAIDs and certain antibiotics.
- Stay well-hydrated and adopt a kidney-friendly diet low in salt and protein if advised by a healthcare professional.
- Regularly consult healthcare providers for comprehensive management.
Kidney problems in diabetic patients are a silent but serious threat that requires vigilance and proactive care. Early signs such as proteinuria, swelling, fatigue, and changes in urination patterns should never be ignored. Regular screening and a disciplined approach to diabetes management are crucial to preserving kidney function and overall health. By recognizing these early warning signs and seeking timely medical advice, diabetic patients can significantly reduce the risk of severe kidney damage and lead healthier lives.
If you have diabetes, prioritize kidney health today. Talk to your doctor about getting screened regularly and adopting preventive strategies to protect your vital organs.
Kidney
Common Causes of Kidney Damage and How to Prevent Them
Kidneys also have a critical function of the preserving overall health through the process of the filtering waste substances and excess fluid from the bloodstream. Kidney damage can cause due to various factors, inhibiting their capacity to function appropriately. The universal causes of kidney damage and following the preventive actions that are essentially lower the odds of the kidney disease are:
Common Causes of Kidney Damage
- Diabetes: The high blood sugar levels related with the diabetes can damage the kidneys over time, making the diabetes that lead the cause of chronic kidney disease (CKD).
- High Blood Pressure: Hypertension exerts the excessive pressure on the blood vessels in the kidneys that lead to damage and impaired function. It is the second most common cause of the CKD.
- Glomerular Diseases: The glomerular diseases that cause the inflammation of the kidney's filtering units, leading to decreased kidney function.
- Polycystic Kidney Disease: The polycystic kidney disease that cause the genetic disorder leads to the growth of numerous cysts in the kidneys, impairing their function.
- Autoimmune Diseases: The autoimmune diseases like lupus that can cause the immune system to attack the kidneys, leading to tenderness and damage.
- Urinary Tract Obstructions: The urinary tract obstructions are such as kidney stones or an inflated prostate can block the flow of the urine that causes the pressure and potential kidney damage.
- Use of Tobacco Products: The use of tobacco product that is smoking and tobacco that can reduce blood flow to the kidneys and increase the risk of kidney disease.
Preventive Measures
- Manage Blood Sugar Levels: To manage the blood sugar level the individual should have the diabetes that maintains the optimal blood sugar level that is crucial. It also regulate and monitor and adherence the prescribed the medications that can help to prevent the kidney complications.
- Control Blood Pressure: To control the blood pressure is to regulate and monitor he management of the blood pressure through the lifestyle medications that can reduce the risk of the kidney damage.
- Adopt a Healthy Diet: It also adopt and consume a balanced diet rich in fruits, vegetables and low-fat dairy products while the reduce the salt and add sugars supports with kidney health.
- Engage in Regular Physical Activity: To engage in the regular physical activity that helps to maintain the healthy weight, with lower the blood pressure, and reduces the risk of the kidney disease.
- Avoid Smoking and Tobacco Use: To avoid the smoking and tobacco use also quit the products that can significantly to reduce the risk of the kidney disease and improve overall health.
- Stay Hydrated: To drink the adequate water helps the kidneys clear sodium and toxins from the body, reducing the risk of kidney stones and infections.
- Limit Over-the-Counter Painkillers:There should be limit in the counter of the painkiller and have excessive painkillers like ibuprofen that can cause the kidney damage.
- Regular Health Check-ups: The Routine medical examinations can detect early signs of kidney dysfunction, allowing for timely intervention and management.
Conclusion
It can be concluded that the common causes of kidney damage and implementing these preventive strategies, individuals can significantly reduce their risk of developing kidney disease. Proactive management of health through lifestyle choices, regular medical consultations, and undergoing a kidney function test when necessary is essential for maintaining optimal kidney function and overall well-being.
Kidney
5 Overlooked Signs of Kidney Disease in Diabetics
Kidney disease, especially diabetic nephropathy, is a significant issue for people with diabetes. High blood sugar can harm the blood vessels in the kidneys over time, affecting their ability to filter waste and excess fluid from the body. Many diabetes patients know that their condition can harm their kidneys, but they often miss early signs of kidney disease. Addressing these subtle symptoms early can help manage the condition and promote better health outcomes.
Here are five commonly ignored symptoms of kidney disease for people living with diabetes:
1. Foamy Urine:
One of the first signs of kidney trouble is protein in the urine. When the kidneys are damaged, proteins like albumin can leak into urine, making it look foamy or bubbly. People often think foamy urine is normal, but it can indicate stress on the kidneys.
2. Frequent Nighttime Urination:
Diabetes can lead to frequent urination, especially at night. If the kidneys aren’t filtering waste effectively, this can worsen, leading to more nighttime trips to the bathroom. Many people blame this on drinking too much before bed or aging, not realizing it might be a kidney issue.
3. Swelling in Feet and Ankles:
Diabetic nephropathy can cause a buildup of waste and fluid, resulting in swelling in the feet, ankles, and sometimes hands. This swelling occurs because the kidneys can’t balance fluid and sodium. People might mistake it for weight gain or sitting too long, ignoring it as a warning sign.
4. Nighttime Leg Cramps:
Leg cramps, especially at night, can be another overlooked sign of kidney issues. They often happen due to imbalances in electrolytes, like calcium and potassium, which the kidneys normally regulate. Many diabetics dismiss these cramps as dehydration or lack of exercise.
5. Unexplained Fatigue:
As kidney function declines, waste builds up in the blood, leading to tiredness. The kidneys also produce a hormone vital for making red blood cells. If the kidneys are damaged, less of this hormone is produced, leading to anemia and increased fatigue. Diabetics might chalk this up to their diabetes, missing the link to kidney health.
Importance of Early Detection
Regular monitoring of kidney health through blood and urine tests is crucial for diabetes patients. Early detection can prevent severe complications like end-stage renal disease, which often requires dialysis or a kidney transplant.
Tips for Maintaining Kidney Health:
- Keep blood sugar levels stable.
- Manage blood pressure effectively.
- Follow a kidney-friendly diet.
- Limit painkiller use.
- Exercise regularly and maintain a healthy weight.
- Reduce salt and processed food intake.
By being aware of these symptoms and taking preventive measures, individuals with diabetes can help protect their kidney health.
Frequently Asked Questions
HbA1c stands for haemoglobin A1c. It refers to haemoglobin in the blood that has glucose attached to it. The HbA1c test full form is commonly understood as the haemoglobin A1c test.
An HbA1c level of 6.5% or above may indicate diabetes. Very high levels may suggest poor blood sugar control and should be reviewed by a doctor to reduce the risk of complications.
For many adults, an HbA1c below 5.7% is generally considered normal. However, for people around 70 years of age, individual targets may vary depending on overall health, diabetes status, medicines and risk of low blood sugar.
No single food can reduce HbA1c immediately. A balanced diet with high-fibre foods, pulses, whole grains, vegetables, lean protein, healthy fats and controlled portions may help improve blood sugar control over time.
Fasting is usually not required for an HbA1c test. However, if your doctor has advised other tests along with it, such as a Blood Sugar Fasting Test or fasting insulin test, you may need to fast.
An HbA1c level between 5.7% and 6.4% may indicate prediabetes. Your doctor may advise lifestyle changes, repeat testing or additional blood sugar tests based on your health profile.
Many people with diabetes may be advised to take the HbA1c test every 3–6 months. The frequency depends on blood sugar control, treatment changes, diabetes type and doctor recommendations.
If HbA1c is too high, it may mean your average blood sugar has been above the recommended range over the past few months. Your doctor may review your diet, medicines, activity level and further test requirements.
The HbA1c test cost may vary depending on your city, diagnostic centre, home sample collection option and available offers. You can check the latest HbA1c test price near you on Manipal TRUtest.
You can book an HbA1c test near you through Manipal TRUtest by selecting your city or pin code. Depending on availability, you can choose a nearby centre or home sample collection.
Yes, you can book an HbA1c test online with Manipal TRUtest. Click ‘Book Now’ on the HbA1c test page, log in or register, select your location, check the HbA1c test price, choose your preferred slot, and confirm your booking.
Yes, home sample collection may be available for HbA1c tests in selected locations. You can check availability by entering your city or pin code while booking with Manipal TRUtest.
