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Blood Glucose Test: What Your Sugar Levels Mean

Blood glucose measures the amount of sugar (glucose) circulating in your bloodstream. It is the primary test used to screen for diabetes, prediabetes, and hypoglycemia, and is one of the most commonly ordered lab tests worldwide.

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Normal Range

70 – 99 mg/dL (fasting)

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Unit

mg/dL

What Your Results Mean

Normal

Normal fasting glucose means your body is effectively regulating blood sugar, indicating good insulin sensitivity and healthy pancreatic function.

High

High blood glucose (hyperglycemia) can indicate prediabetes (100–125 mg/dL) or diabetes (126+ mg/dL). Long-term high glucose damages blood vessels, nerves, kidneys, and eyes.

Low

Low blood glucose (hypoglycemia) causes shakiness, sweating, confusion, and in severe cases loss of consciousness. It can result from medication, skipping meals, or insulin overuse.

Frequently Asked Questions

What is a normal blood glucose level? expand_more

Normal fasting glucose is 70–99 mg/dL. Prediabetes is 100–125 mg/dL and diabetes is diagnosed at 126 mg/dL or higher on two separate tests.

Do I need to fast for a glucose test? expand_more

Fasting glucose tests require 8 hours of fasting. Random glucose tests can be done at any time but results above 200 mg/dL with symptoms suggest diabetes.

What causes high blood sugar? expand_more

Common causes include type 1 or type 2 diabetes, prediabetes, stress, certain medications (like steroids), and poor diet high in refined carbohydrates.

How can I lower my blood glucose naturally? expand_more

Regular exercise, reducing refined carbohydrates, increasing fiber intake, maintaining a healthy weight, and managing stress all help lower blood glucose levels.

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