Creatinine Test (2024)

Creatinine Test

Creatinine Test-Uses

Creatinine Test-Results

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The creatinine test is a test that measures creatinine levels in your blood or urine to know if your kidneys are functioning correctly. Creatinine is a chemical compound that is a naturally produced substance in our bodies. The kidneys filter this substance and throw it out through urine. This test measures the creatinine level formed during regular or everyday activity to find if your kidneys are functioning properly.

What is the Creatinine Test used for?

The creatinine test is used to measure creatinine levels, whose high levels may indicate kidney dysfunction. Your doctor may order this test if you face symptoms such as fatigue, foamy urine, etc. This test involves some associated tests called blood urea nitrogen (BUN) or comprehensive metabolic panel (CMP). A CMP is a group of tests that diagnoses different organs, including the Creatinine Test.

Understanding the test results of the Creatinine Test

Creatinine levels are measured in milligrams of creatinine per deciliter of blood (mg/dL) or micromoles of creatinine per liter of blood (micromoles/L). Normal creatinine levels vary between men and women.

Normal range of Creatinine test based on age and gender:

Gender

Age Range

Normal Creatinine Levels (mg/dL)

Men

18 – 60 years

0.9 – 1.3

Women

18 – 60 years

0.6 – 1.1

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Frequently Asked Questions:

what is the normal creatinine level in urine?

Normal creatinine levels differ in urine and blood tests. In urine, the results are based on factors such as muscle mass and age. For males, the normal range is typically 7 to 16 mmol/day, while for females, it is usually 5.3 to 14 mmol/day. Conversely, blood tests show normal creatinine levels between 0.7 and 1.3 mg/dL in males and 0.5 and 1.1 mg/dL in females. However, individual factors should be considered, and a healthcare professional's interpretation is advised.

Why do I need a Creatinine Test?

The creatinine test is necessary to detect kidney disease. You might need this test if you're experiencing symptoms such as fatigue, decreased appetite, frequent and painful urination, foamy or bloody urine, puffiness around the eyes, or swelling in your feet and/or ankles.

What happens during the Creatinine Test?

In a creatinine blood test, a healthcare technician will draw a blood sample by inserting a small needle into a vein in your arm. For a creatinine urine test, you will be instructed by your healthcare professional to collect your urine in a provided container. The samples are then sent to laboratories for analysis. This test measures the amount of creatinine in your blood compared to the amount in your urine over a 24-hour period.

What are the indicators of High Creatinine Levels?

High creatinine levels in the blood, often indicative of compromised kidney function, might show symptoms such as fatigue, swelling, and changes in urination patterns. These symptoms could suggest kidney conditions including autoimmune diseases, bacterial infections, diabetic complications, blocked urinary tract, or heart failure. Early consultation with a healthcare professional is important for proper diagnosis, treatment, and management of high creatinine levels.

How to reduce creatinine levels?

To naturally reduce creatinine levels, ensure proper hydration, adjust your diet by decreasing high-protein foods and increasing fiber intake. Regular exercise, diabetes management, and blood pressure monitoring are all recommended. Consult your healthcare provider about medications. Reduce your intake of salt, processed foods, and avoid excessive NSAID use. Quit smoking, limit alcohol, and seek medical advice before making major lifestyle changes for kidney health improvement.

What should I know about Low Creatinine Levels?

Low creatinine levels might indicate muscular or kidney problems. Causes include muscle diseases, malnutrition, and advanced liver disease. Symptoms might involve muscle weakness or fatigue. Treatment depends on the underlying cause, which could include improved nutrition or managing health conditions. Consult a healthcare professional for accurate diagnosis and proper guidance on treatment options if you suspect or are diagnosed with low creatinine levels.

how to increase creatinine levels?

To increase creatinine levels, consider exercise and diet. Gentle workouts and an increased intake of creatine-rich foods can help, especially for vegetarians with limited protein intake. High-intensity exercisers can safely use creatine supplements. Notably, the body naturally produces creatine; most people who follow a healthy diet don't need supplements. Low creatinine levels may indicate problems such as liver disease, which is frequently accompanied by symptoms. Proper medical assessment is vital. Generally, diet adjustments can help with low levels.

What should you not do before the creatinine test?

Before a creatinine test, there are specific precautions to follow. Your doctor might advise you to avoid eating cooked meat, as it can elevate creatinine levels in your blood or urine. Additionally, fasting overnight may be required before the test.

What foods should be avoided if creatinine is high?

If your creatinine levels are high, your doctor generally advises avoiding eating high-protein foods such as processed meat, dairy products, and canned foods. Additionally, vegetable protein sources such as beans should be included in one's diet.

when to worry about creatinine levels?

Concern about creatinine levels if they consistently rise above the normal range. Elevated creatinine may indicate kidney dysfunction. Consult a healthcare professional if levels remain high, as it could signify underlying health issues that need evaluation and management.

Creatinine Test (2024)

FAQs

Is a creatinine test enough for kidney function? ›

GFR is estimated from results of a serum (or blood)creatinine test. The GFR tells how well your kidneys are working to remove wastes from your blood. It is the best way to check kidney function. A serum (or blood) creatinine test alone should not be used to check kidney function.

Can a creatinine blood test be wrong? ›

Creatinine clearance is only an estimate of GFR, and in some cases can provide a result that's higher than what your GFR really is. In addition, there are a few reasons that the results could be high or low. These include: Not collecting your urine correctly.

Can you get a false creatinine reading? ›

There are various causes of factitious elevation of creatinine. They can be broadly grouped into increased production of creatinine, interference with the assay and decreased tubular secretion of creatinine.

What is the most accurate test for creatinine? ›

An eGFR is a more accurate way to measure kidney health than creatinine levels in blood or urine alone. An eGFR can also help show how serious kidney disease may be. Creatinine levels in blood and urine maybe be compared with each other. This is called a creatinine clearance calculation.

Is creatinine a good indicator of kidney function? ›

Creatinine is a useful indicator of renal health because it is excreted in the urine as an unchanged and easily measured by-product of muscle metabolism. In a healthy kidney, little or no creatinine is reabsorbed, whereas, in kidney disease, the creatinine concentration in the blood may increase.

What is more important, creatinine or GFR? ›

Estimated GFR

eGFR is more accurate than serum creatinine alone. Serum creatinine is affected by muscle mass, and related factors of age, sex, and race. eGFR is not reliable for patients with rapidly changing creatinine levels, extremes in muscle mass and body size, or altered diet patterns.

What can throw off a creatinine test? ›

You may be asked to avoid eating or drinking anything (except water) for several hours before the test. In some less common situations, you may also be asked not to eat any cooked meat the night before the test. Cooked meat can increase the level of creatinine in your blood and affect your eGFR results.

What if creatinine test is not normal? ›

What Abnormal Results Mean. A higher than normal creatinine level may be due to: Blocked urinary tract. Kidney problems, such as kidney damage or failure, infection, or reduced blood flow.

Can drinking water lower creatinine? ›

Medicines: Certain medicines can increase creatinine levels. Meat consumption: Eating a large amount of meat can briefly increase creatinine levels for 6-12 hours. Water intake: Drinking a lot of water just before a blood test can temporarily lower creatinine levels.

Is slightly high creatinine bad? ›

Creatinine, which is a waste product produced by the muscles, gets filtered out by the kidneys. Your blood test result got flagged because a buildup of creatinine in the blood can be a sign of impaired kidney function. This can lead to chronic kidney disease.

What is the best drink to restore kidney function? ›

What are the best drinks to cleanse the kidneys?
  • Carrot juice. ...
  • Beet juice. ...
  • Teas. ...
  • Apple juice. ...
  • Orange juice. ...
  • Lemon juice. ...
  • Green and black tea. ...
  • Coffee. Coffee, especially caffeinated coffee, actually decreases the risk of kidney stones.
Feb 1, 2024

What is the alarming result of creatinine? ›

Creatinine levels of 2.0 or more in infants and 5.0 or more in adults may indicate severe kidney damage. People who are dehydrated may have elevated creatinine levels.

What should you not do before creatinine test? ›

How you prepare. A standard blood test is used to measure creatinine levels in your blood (serum creatinine). Your doctor may ask you not to eat (fast) overnight before the test. For a creatinine urine test, you may need to collect urine over 24 hours in containers provided by the clinic.

Can creatinine levels be wrong? ›

Unfortunately, the initial creatinine tests can lead to misdiagnosis and inappropriate treatment.” Misdiagnoses appear to be common, according to the researchers' review of the electronic health records of 3.8 million emergency and intensive care patients.

Does creatinine overestimate? ›

Creatinine is freely filtered at the glomerulus and not reabsorbed; however, it is actively secreted by the proximal convoluted tubule, which can be up to 15%. This may lead to over estimation in creatinine clearance. However, there is some attenuation by the plasma concentration also being overestimated.

Can you have high creatinine and normal kidney function? ›

The opposite can also be true – some people with a “high” creatinine level may not have kidney disease, or it may be less severe than it seems. So, the best way to know how well your kidneys are working is to look at your estimated glomerular filtration rate (eGFR).

What test is best for kidney function? ›

Kidney checkup: two simple tests

CKD is evaluated using two simple tests – a blood test known as the estimated glomerular filtration rate (eGFR) and a urine test known as the urine albumin-creatinine ratio (uACR). Both tests are needed to have a clear picture of your kidney health.

Can you have a low GFR and a normal creatinine level? ›

People over age 60 may have an apparently normal creatinine blood level but still have a low GFR. This opposite can also be true, where GFR may be mildly low but there is no real kidney disease.

What is the most reliable test for GFR? ›

The gold standard for measuring GFR is using plasma or urinary clearance of an exogenous filtration marker.

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