What is Fasting Blood Sugar (Fasting Glucose)?
Fasting Blood Sugar is measured as part of a diabetes & blood sugar panel. Your fasting blood sugar is in the normal range — no sign of diabetes or prediabetes.
What does a high Fasting Blood Sugar mean?
Your fasting blood sugar is elevated. Values between 100–125 mg/dL indicate prediabetes. At 126+ mg/dL, this may indicate diabetes. Lifestyle changes — diet, exercise, weight management — can often reverse prediabetes.
If markedly elevated: Your blood sugar is critically high. This level can cause diabetic emergencies. Please seek medical attention promptly.
What does a low Fasting Blood Sugar mean?
Your fasting blood sugar is low (hypoglycemia). This can cause shakiness, sweating, dizziness, and confusion. Common causes include skipping meals, diabetes medication, or insulinoma.
If markedly low: Your blood sugar is critically low (severe hypoglycemia). This can cause confusion, seizures, and loss of consciousness. Seek immediate help.
Understand your whole report, not just one number
A single value rarely tells the full story — Fasting Blood Sugar is best read alongside the rest of your panel. Paste your values or upload your report and get a plain-English explanation of every marker, with the important results flagged.