Diabetes / Glucose
Also known as: blood sugar, fasting plasma glucose (FPG), fasting blood sugar (FBS)
If you experience severe symptoms like fainting, seizures, extreme confusion, or difficulty speaking, seek immediate medical attention. These could be signs of dangerously high or low blood glucose levels.
This blood test checks your blood sugar level. You should not eat for at least 8 hours before the test. Sugar, also called glucose, gives your body energy. Insulin is a helper. It moves sugar into your body's cells.
Doctors order this test for a few reasons. It helps them check for or keep an eye on prediabetes and diabetes. This test can also figure out why you might have symptoms from blood sugar that is too high or too low. Sometimes, it helps doctors see if a medicine is causing problems.
Reference ranges for fasting blood glucose can vary by laboratory and may depend on age, sex, pregnancy status, and clinical context. Always discuss your specific results with your healthcare provider.
Clinical Reference
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Educational purposes only — This information is not a substitute for professional medical advice, diagnosis, or treatment. Always discuss your lab results with your healthcare provider.