What Is a Normal Fasting Blood Sugar Level?

Fasting blood sugar measures glucose after 8+ hours without food.

Ranges

• Normal: 70–99 mg/dL
• Prediabetes: 100–125
• Diabetes: 126+ (two tests)
• Hypoglycemia: below 70

How to Prepare

• No food 8+ hours
• Water is fine
• Morning draw best

What Affects Results

• Recent food (elevates)
• Stress (elevates)
• Steroids (elevate)
• Alcohol (can lower)