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Random Blood Sugar Test: All You Need to Know

03 Aug, 2022

Blog author iconHealthtrip Team


Glucose or sugar level is one of the most important units in the body that serves as the primary source of energy. It's important for the normal functioning of our brain. A normal blood glucose level is required for the overall functioning of our body and brain as well. That’s why it’s important to monitor the blood glucose level, especially for diabetic people. Random blood sugar(RBS) is one such method. Here we’ve discussed RBS, how it works, how to interpret the test results, and many more.

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What is an Random blood sugar(RBS) test?

A random blood sugar(RBS) test involves testing the blood sugar level at any time of day. The RBS test is used to confirm diabetes mellitus, as well as during and after diabetes treatment. A level of 200 mg/dl or higher indicates diabetes mellitus.

How is Random blood sugar(RBS) done?

In contrast to the Fasting Blood Glucose Test, the procedure for a random blood sugar test is quite simple and does not even require fasting. An injection is used to draw blood from the veins for the RBS test. Apart from a minor prick, the RBS test causes little discomfort.

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Why do you need to undergo RBS tests?

There are many different types of glucose tests, and they can all be used to estimate blood sugar levels at a specific time or over a longer period of time to obtain average levels or to see how quickly the body can normalize changed glucose levels.

For example, eating causes blood sugar levels to rise. These levels quickly return to normal in healthy people due to increased cellular glucose uptake, which is primarily mediated by an increase in blood insulin levels.

Glucose tests can detect both short-term and long-term hyperglycemia or hypoglycemia. These are conditions that may not have obvious symptoms but can cause long-term organ damage. Abnormally high or low levels, a slow return to normal levels after either of these conditions and/or an inability to normalize blood sugar levels indicate that the person being tested has a medical condition such as type 2 diabetes, which is caused by cellular insensitivity to insulin. As a result, glucose tests are frequently used to diagnose such conditions.

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The cost of Random blood sugar(RBS) test in India

The cost of an RBS test varies from city to city and from pathological lab to pathological lab. The overall RBS test cost is very nominal. The price may range from Rs. 70 to Rs. 150 per sample.

How to interpret random blood sugar test (RBS)results?

The following reference table will help you understand the test results.

Reference range



Normal glucose tolerance


Impaired glucose


Provisional diagnosis- Diabetes Mellitus

In some cases, the RBS test alone is insufficient to confirm the diagnosis of diabetes. A patient may be advised to use additional testing methods such as:

  • Tolerance Exam
  • Fasting blood sugar
  • HbA1C test
  • Postprandial blood glucose test for two hours

Type 2 diabetes can develop slowly, making symptoms difficult to detect at first. Diabetics may also experience tingling or numbness in their hands or feet, a condition known as diabetic neuropathy. This is more likely to happen if a person does not control their blood glucose for an extended period of time.

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In conclusion, monitoring blood glucose levels, especially for diabetic individuals, is crucial for overall health and wellbeing. The random blood sugar (RBS) test provides valuable information about blood sugar levels at any given time. By understanding the RBS test, its interpretation, and the significance of the results, individuals can take proactive steps towards managing their blood sugar levels effectively.

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The RBS test is used to confirm diabetes mellitus, monitor blood sugar levels during and after diabetes treatment, and assess overall glucose control.