what is blood sugar on a blood test
Asked by: GlucoseWatcher
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Community Answer
Answered by Dr. Emily Carter, MD
Blood sugar, also known as blood glucose, refers to the amount of glucose present in your bloodstream. Glucose is a type of sugar that comes from the food you eat and serves as the primary source of energy for your body's cells. A blood test to measure blood sugar levels is commonly used to diagnose and monitor conditions like diabetes and prediabetes.
Types of Blood Sugar Tests:
- Fasting Blood Sugar Test: Measures blood glucose after you have not eaten for at least 8 hours.
- Random Blood Sugar Test: Measures blood glucose at any time, regardless of when you last ate.
- A1C Test: Provides an average blood sugar level over the past 2-3 months.
Normal Blood Sugar Ranges:
Test Type Normal Range
Fasting 70–99 mg/dL
Random Below 140 mg/dL
A1C Below 5.7%
If your blood sugar levels are consistently high, it may indicate diabetes or prediabetes. Consult your healthcare provider for further evaluation and management.