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A blood glucose test measures the glucose levels in your blood. Glucose is a type of sugar. It is your body’s main source of energy. A hormone called insulin helps move glucose from your bloodstream into your cells.
Too much or too little glucose in the blood can be a sign of a serious medical condition. High blood glucose levels (hyperglycemia) may be a sign of diabetes.
Low blood glucose levels (hypoglycemia) are common among people with type 1 diabetes and people with type 2 diabetes who take certain diabetes medicines. Without treatment, severe low blood sugar can lead to major health problems, including seizures and brain damage.
A blood glucose test is used to find out if your blood sugar levels are in a healthy range. It is often used to help diagnose and monitor diabetes.
We may order a blood glucose test if you have symptoms of high glucose levels or low glucose levels.
Symptoms of high blood glucose levels include:
Increased thirst and urination
Blurred vision
Sores that don’t heal
Weight loss when you’re not trying to lose weight
Numbness or tingling in your feet or hands
Symptoms of low blood glucose levels include:
A fast heartbeat or arrhythmia (a problem with the rate or rhythm of your heartbeat)
Having trouble seeing or speaking clearly
Fainting or seizures
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