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Educational Guide

What Does Glucose (Fasting) Mean?

Fasting glucose measures your blood sugar after 8+ hours without eating. Elevated levels may suggest insulin resistance, prediabetes, or diabetes.

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What Glucose (Fasting) Measures

Fasting glucose is the concentration of sugar in your blood after not eating for at least 8 hours. It reflects how well your body regulates blood sugar when it isn't processing a meal. It's one of the primary screening tests for diabetes and prediabetes.

Normal Ranges

Normal70–99 mg/dL
Prediabetes100–125 mg/dL
Diabetes≥ 126 mg/dL

Reference ranges may vary slightly by lab. Always use the range provided on your specific test report.

What Affects Your Glucose (Fasting) Level

  • Diet high in refined carbs and added sugars
  • Lack of physical activity
  • Excess body weight (especially abdominal)
  • Stress and poor sleep
  • Family history of type 2 diabetes

Foods That May Help

High-fiber vegetables

Slow sugar absorption and improve insulin sensitivity

Whole grains (oats, quinoa, barley)

Steady energy release, no spikes

Legumes (beans, lentils)

Low glycemic, high fiber, improves HbA1c

Cinnamon

May improve fasting glucose in some studies

Nuts (almonds, walnuts)

Healthy fats reduce post-meal glucose spikes

When to See Your Doctor

If fasting glucose is above 100 mg/dL, discuss with your doctor. They may order an HbA1c test to check average blood sugar over the past 3 months. Lifestyle changes can often reverse prediabetes.

Related Biomarkers

HbA1c (Glycated Hemoglobin)

what does high HbA1c mean

LDL Cholesterol

what does high LDL cholesterol mean

HDL Cholesterol

what does low HDL cholesterol mean

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Educational content only · Not medical advice