A fasting blood glucose test measures the level of sugar in your blood after you have not eaten for at least 8 hours. This test is commonly used to check for conditions like diabetes or prediabetes. It helps doctors understand how well your body manages blood sugar levels. During the test, a healthcare professional will take a blood sample, usually from your arm. The results indicate whether your blood glucose levels are normal, elevated, or too high, guiding further evaluation or treatment if necessary. Regular testing can help monitor your health and prevent complications related to diabetes.