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The blood glucose test is a core test in screening for diabetes and checks the level of glucose, or sugar, in the blood. Sometimes known as a fasting blood sugar (FBS) test because it is usually performed after an 8-hour fast, this test is frequently used by diabetics to manage their medications and by people in general who want a basic screen for diabetes.
Technological innovations over time have made the blood glucose test more accessible by allowing people to check their blood glucose levels using a home device called a glucose meter and a drop of blood from one's finger. However, some people prefer to get their glucose test done at a lab to avoid user error or because they want to test other markers such as their hemoglobin A1c level concurrently to have a more accurate diabetes screening panel.
The glucose test also plays a role in other tests. For example, the blood glucose level is measured as part of the glucose tolerance test during which an oral solution is administered and blood glucose levels are measured to understand how quickly the body can clear glucose out of the bloodstream.