The blood sugar test is a test used to determine how much sugar is present in a blood sample after a person has fasted overnight, Dr. Denis said. Fasting really means refraining from eating or drinking any food or liquid other than water for at least 8 hours. An empty stomach blood glucose (sugar) test is used to detect diabetes.
Usually a blood sample is taken at the laboratory or hospital in the morning before breakfast. The normal range of on an empty stomach glucose is between 70 and 100 mg/dL. Lean glucose levels between 100 and 126 mg/dL indicate diabetes, and a person is declared diabetic if the blood glucose level is 126 mg/dL or higher, Dr. Slinkin specifies.
How does the blood sugar level FBS change with meals?
Blood sugar levels rise after meals and usually peak about an hour after meals. The increase in blood sugar levels and the exact time of its peak depends on the food a person has eaten. A large meal often increases blood sugar levels, as with a meal containing high-sugar carbohydrates such as white bread and sweet snacks.
Typically, higher blood sugar levels encourage the pancreas to release insulin, and insulin lowers blood sugar levels, destroying it so that the body can use it for energy or store it for later use. However, people with diabetes may face the following problems:
Patients with type 1 diabetes do not produce the required amount of insulin because the body attacks the cells that produce insulin.
Patients with type 2 diabetes mellitus have a poor response to the insulin produced by the body and may not produce enough insulin later.
In both cases, the post test shows elevated blood sugar levels FBS.
Therefore, on an empty stomach sugar depends on 3 factors:
The content of the last meal, i.e. dinner.
The body’s ability to produce insulin and its ability to respond to the insulin it produces.
Sugar Blood Testing: Preparation and Procedure
A blood sugar test is usually performed to measure blood glucose levels FBS after a certain time of fasting. In healthy people, the hormone insulin helps to reduce blood sugar levels after fasting, but in diabetics the hormone does not function properly, so the glucose level is found to be higher. The test is used to diagnose diabetes or to test the effectiveness of diabetes medication in people who have already had diabetes.