Blood Glucose Fasting (FBS) Test
What is Blood Glucose Fasting (FBS) Test
The Blood Glucose Fasting test measures the level of blood sugar after an overnight fast (no food or drink, except water) for at least 10 to 12 hours. The building block of carbohydrates is glucose, which acts as the major source of energy for all the cells of the body. Carbohydrates get metabolized quickly into glucose in the body, thereby increasing blood sugar levels.
This test is essential for people with high blood sugar levels who may require urgent treatment to control them. It may be included as part of a panel of blood tests, such as a comprehensive metabolic panel.
Blood Glucose Fasting test is also known as Fasting Blood Glucose (FBG), Blood Sugar, Fasting Blood Sugar (FBS), Fasting Plasma Glucose (FPG).
What is Blood Glucose Fasting (FBS) used for?
This test is helpful in determining:
- Risk of diabetes in individuals
- Management of diabetes
- Diabetes treatment response
- Blood sugar levels in the body
Symptoms of Glucose Dysregulation
Sweating
Shakiness
Weakness
Excessive hunger
Dizziness
Headache
Blurred vision
Heart palpitations
Irritability
Drowsiness
Confusion
Fainting
Excessive thirst
Frequent urination
Unexplained weight loss
Who should get tested?
A blood glucose fasting (FBS) test is done in any of the following listed cases:
Age over 35 years
Obese or overweight individuals
High cholesterol
High blood pressure/hypertension
Test preparation
This test requires a person to fast (no food or drink, except water) overnight for at least 10 to 12 hours before undergoing it.
Interpretation of results
|
Fasting Blood Sugar (mg/dL) |
Result indicated |
|
Less than 99 or lower |
Normal |
|
Between 100-125 |
Pre-diabetes |
|
126 and above |
Diabetes |
Deviations from normal levels indicate the following:
- Fasting blood sugar between 100-125 mg/dL indicates pre-diabetes. This implies that your blood sugar levels are higher than normal but not high enough to be considered diabetes. Your healthcare provider may recommend that you repeat this test every year or two.
- Blood sugar levels above 126 mg/dL may indicate diabetes. In such cases, you may be asked to repeat the test by your healthcare provider, just to be certain. High glucose levels could mean you suffer from either of these conditions: hyperthyroidism, a disorder of the pancreas, stress due to surgery, or a life-threatening illness or trauma.
FAQs
What is the turnaround time (TAT) for blood glucose fasting test?
The turnaround time (TAT) for a blood glucose fasting test is within the same day as the sample collection. Sometimes, the results may get delayed.
Are there any risks associated with this test?
This test involves negligible risks. However, one might experience slight bruising or swelling at the site of needle insertion, which usually goes away on its own within a few minutes.
What is the difference between random and fasting blood sugar?
Random blood sugar can be checked at any point of the day, irrespective of when you last ate. On the other hand, in fasting blood sugar, as the name suggests, a person is required to fast overnight for at least 10 to 12 hours before undergoing this test.
What do high blood sugar levels indicate other than diabetes?
High glucose levels could mean you suffer from either of these conditions: hyperthyroidism, a disorder of the pancreas, stress due to surgery, or a life-threatening illness or trauma.
What are the best foods to lower my blood sugar?
The meal plan must be adjusted to an individual's personal needs. Testing your glucose levels throughout the day will show you how your foods affect your blood sugar levels. Consume high-fiber diets, stay hydrated, and prioritize veggies, legumes, and seafood.
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