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A screening test for type 2 diabetes (type 2 diabetes mellitus) is a blood test to measure your blood sugar (glucose) level. This test is done to check for early signs of diabetes, before you develop symptoms.
Normally, insulin allows blood sugar (glucose) to enter cells in the body. The cells use glucose for energy. Insulin resistance or lack of insulin causes excess glucose to build up in the blood instead of going into cells. This results in high blood glucose levels (hyperglycemia), which can cause many complications.
You may be screened for type 2 diabetes as part of your regular health care, especially if you have a high risk for diabetes. Screening can help to identify type 2 diabetes at its early stage (prediabetes). Identifying and treating prediabetes may delay or prevent the development of type 2 diabetes.
Children and adolescents
Your health care provider or your child's health care provider may recommend having a screening more or less often.
Your test results are a measurement of how much glucose is in your blood. Normal blood glucose levels mean that you do not have diabetes or prediabetes. High blood glucose levels may mean that you have prediabetes or diabetes. Depending on the results, other tests may be needed to confirm the diagnosis.
These blood tests may be repeated to confirm your diagnosis. Talk with your health care provider about what your results mean.
This information is not intended to replace advice given to you by your health care provider. Make sure you discuss any questions you have with your health care provider.
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