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What is a fasting blood glucose test?

glucose fasting test

What is a fasting blood glucose test?

Your body converts sugars, which you eat into glucose.

Glucose testing is primarily for people with type 1 diabetes, type 2 diabetes, and gestational diabetes. Diabetes is a condition that raises your blood glucose levels.

Your blood sugar levels are normally controlled by the insulin hormone. However, if you have diabetes, your body either does not make enough insulin or the insulin produced does not work properly. It makes sugar in your blood. Elevated blood sugar levels can cause serious organ damage if left untreated.

In some cases, blood glucose tests may also be used to test for hypoglycemia. When you are in this situation when blood glucose levels are too low.

How to prepare for a fasting blood glucose test

For a fasting blood glucose test, eight hours before your test will not be able to eat or drink anything except water. You may want to schedule a fasting glucose test in the morning so you don’t have to fast during the day. Fast tests are common because they are easy to interpret and more accurate results.

Before your test, tell your doctor about the medications you are taking, including prescriptions, over-the-counter medications, and herbal supplements. Some drugs can affect blood glucose levels. Your doctor may tell you to stop taking certain medications or to change the dose temporarily before the test.

What to expect during a fasting blood glucose test

Your doctor needs to draw blood from a vein.

Before drawing blood, the health care provider cleans the area with antiseptic to kill any germs. They then tie an elastic band around your upper arm causing your veins to swell with blood. Once a vein is found, they insert a needle into it. Your blood is then drawn into the tube attached to the needle.

You may feel some pain when the needle is inserted but you can easily reduce the pain by relaxing your hand.

When they finish drawing the blood, they remove the sweetie and put a bandage on the puncture site. Pressure will be applied to the puncture site for a few minutes to prevent injury.

Blood samples are then sent to the lab for test. Contact your doctor to discuss the results with you.

Fasting blood glucose range?

Blood samples will be taken overnight after fasting. Blood sugar of less than 100 mg / dL (5.6 mmol / L) is normal. From 100 to 125 mg / dL (6.9 to 5.6 mmol / L) is considered a fasting blood sugar trend. If it is 126 mg / dL (7 mmol / L) or more in two separate tests, it’s bad news,  you have diabetes.

Fasting blood glucose in pregnancy

The blood glucose (sugar) levels in most pregnant women:

  • Fasting <5.3 mmol / L
  • 1 hour after eating <7.8 mmol / L
  • 2 hours after eating <6.7 mmol / L

Fasting blood sugar levels with age

Younger than 6 years oldmg/dL
Before meal100-180
1-2 hours after eating~180

Children under the age of 6 should have a blood glucose level of about 80 to 200 mg / dL per day. This range is considered healthy, and the amount of glucose in the child’s body fluctuates after eating and waking up again before bedtime. For this reason, children with diabetes or hypoglycemic episodes may need to have their parents’ blood sugar levels checked at midnight.

Age 6-12 mg/dL
Before meal90-180
1-2 hours after eatingUp to 140

Children 6 to 12 years of age should have a blood sugar level that is between 80 and 180 mg/dL in a day. Blood sugar levels rise after eating because the body breaks down carbohydrates into glucose, which is distributed throughout blood pressure. Baby’s blood sugar can rise too much before going to bed, especially if they have diabetes, so try to limit snacks before going to bed.

Age 13-19 mg/dL
Before meal90-130
1-2 hours after eatingUp to 140

Adolescents should have a blood sugar level of 70 to 150 mg/dL per day. Adolescents with diabetes can often be the most difficult because managing diabetes requires responsibility and behavioral control that is not ideal for most adolescents. Adolescents should observe what they eat, exercise, and if they have any diabetes medications, they need to keep their blood sugar levels between 70 and 150 mg/dL throughout the day.

20+ years of age mg/dL
FastingLess than 100
Before meal70-130
1-2 hours after eatingLess than 180

Adults 20 years of age or older have a blood sugar level of less than 100-180 mg/dL a day. When you wake up in the morning, your fasting blood sugar level should be the lowest because you have not eaten for about eight hours. If you are an adult and struggling with glucose control, your healthcare provider can help you develop a treatment plan to better manage your blood sugar.

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