Test Detail
Interpreting Results
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Written by
Dr. Betina Chandolia
BDS, MDS - Oral Pathology and Microbiology
Reviewed by
Dr. Ashish Ranjan
MBBS, MD (Pharmacology)
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Test Preparation
  1. No special preparation required


What is Creatinine?

A creatinine test is a measure of how efficiently your kidneys are performing their job of removing waste from your blood. Creatinine is a natural waste product which is present in the blood and urine.

Abnormally high levels of creatinine warn a possible malfunction, damage or failure of the kidneys. If a blood or urine test shows that a person has high creatinine levels, the doctor may order further tests to identify the cause. Creatinine levels can be naturally decreased by changing diet, lifestyle and reducing protein intake. If the levels are still high, your doctor will recommend a treatment plan.

Why is Creatinine done?

  • To evaluate the normal functioning of kidneys

  • To diagnose kidney diseases

  • To monitor treatment for kidney diseases

  • As a part of the metabolic panel


What does Creatinine Measure?

Creatinine is a waste product which is produced by the muscles due to the breakdown of a compound called Creatine. During the cycle of energy production which is required to contract muscles, creatine is produced. Kidneys remove creatinine from the body by filtering it from the blood and then releasing it into the urine. This test measures the amount of creatinine in the blood.

The body produces creatine and creatinine at a relatively same rate. Since kidneys filter most of the creatinine from the blood and release it into the urine, the blood levels can be used as an indicator to know how well the kidneys are functioning. The amount of creatinine produced depends upon the size of the person as well as their muscle mass. That is why levels of creatinine are higher in men as compared to women and children.

Interpreting Creatinine results






         0.6 - 1.2 mg/dL


         0.5 - 1.1 mg/dL


Answers to Patient Concerns & Frequently Asked Questions (FAQs) about Creatinine

Frequently Asked Questions about Creatinine

Q. Is there any risk associated with this test?
There is no risk associated with the test. However, since this test involves a needle prick to withdraw the blood sample, in very rare cases, a patient may experience increased bleeding, hematoma formation (blood collection under the skin), bruising or infection at the site of needle prick.
Q. Is there any special preparation required for the creatinine test?
Yes, overnight fasting is required. Also, it is advised not to eat meat, as it can temporarily increase the levels of creatinine. If you are on any medication or if you have any allergies or if you are suffering from any underlying medical conditions, you should inform your doctor.
Q. Is there any effect of exercise on creatinine levels?
No, the creatinine levels are not affected by moderate exercise. However, the levels may increase if the muscle mass is increased.
Q. What are the conditions in which high levels of creatinine are seen?
High levels of creatinine are seen in cases of kidney infections, damage to blood vessels of the kidneys, swelling of blood vessels of the kidneys, and death of cells in small tubes of kidneys. These increased levels can also be the result of prostate disease, kidney disease, obstruction in the urinary tract, reduced blood flow to the kidneys, and muscle injury. Moreover, some medicines can also cause levels of creatinine to rise.
Q. What are the conditions in which low levels of creatinine are seen?
Low levels of creatinine can be seen in cases of pregnancy.
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