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Glucose Fasting

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Glucose F test determines your blood sugar level after fasting. It is also called the "Fasting Glucose Test" (FGT). The test measures your blood sugar level after you haven't eaten for at least 8 hours. This test helps diagnose diabetes or prediabetes. This test is preferably conducted in the morning because there has been a long gap since you last ate. It gives clues about how your body is managing blood sugar. Your blood sugar levels usually peak after an hour of eating something and after that, it begins to decline.

You need a Glucose F test if you’re showing signs of diabetes or prediabetes such as

  • Unexplained thirst.
  • Frequent urination.
  • Very slow healing of wounds.
  • Blurred vision.
  • Fatigue without no apparent reason.
  • Your body needs glucose for energy.

It gets this glucose from the food you consume. Since the body doesn't need to use up all the glucose that it is getting, the insulin hormone stores the excess glucose safely and then releases it as and when needed by your body.

When you eat food with high glucose content, insulin breaks it down, lowers your blood sugar levels and stores it for later use. If the blood sugar levels are high, it means either your body is unable to produce enough insulin or the insulin that your body is producing is unable to handle glucose. The Glucose F test indicates whether the insulin inside your body is processing glucose or not.

Parameters Included (1)


No of Parameters

Glucose Fasting (1)


Frequently Asked Questions

Since it is a fasting glucose test, for how long should one fast before submitting the blood sample?

For your Glucose F test, it is better that you haven't eaten or drank for at least eight hours. The blood should preferably be drawn in the morning before you have had breakfast. The time between the previous dinner and the upcoming breakfast is usually more than eight hours.

Eating what types of foods can affect my Glucose F test results?

Eating large meals. Consuming foods and drinks with high sugar content. Eating foods with simple carbohydrates such as bread and sweet snacks.

How does insulin control blood sugar levels?

The job of insulin is to take care of the extra sugar or glucose that you consume. Your body needs glucose for energy. But it cannot consume all the glucose that it gets. Insulin breaks down the access glucose and stores them so that later, when you need energy, you can get it. When insulin is unable to do so or when there is scarcity of insulin in your body, your blood sugar levels increase. A Glucose F test can tell you if there is some problem with your insulin.

Can I do a Glucose F test from home?

Whether you want a simple Glucose F test or its advanced version, you can get both the tests done from your home. For a simple test, you need the typical diabetes testing kit. You can measure the level of glucose in your blood within a few minutes. Even if you need an advanced Glucose F test, there is no need to visit our lab. Once an appointment is fixed, we can send a technician to your home who will draw a blood sample and then submit the sample to our lab. The results will be then emailed to you as a PDF file through your registered email ID.

Is diabetes hereditary?

Diabetes is mostly a lifestyle -related disease, but yes, it is hereditary. It is not necessary that if your parents have it you may also have it, but these are greater chance of you having it. Hence, it is better that you get regular Glucose F tests done at regular intervals. Also, if you have a sedentary lifestyle, if you are obese and if you consume lots of carbohydrates and sugary foods and drinks, just to be on the safer side, you should get a Glucose F test done and take corrective measures.

How often should I test my glucose levels?

People who have diabetes are advised that they test their glucose or sugar levels every day and keep a record. Otherwise, it is safe to have a comprehensive Glucose F test once in 3 months if you feel there is a possibility that you might be diabetic.

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