Blood Sugar Glucose - Fasting

A good fasting blood glucose is below 100 mg/dL (5.6 mmol/L). Levels of 100–125 mg/dL (5.6–6.9 mmol/L) suggest prediabetes; a fasting level ≥126 mg/dL (7.0 mmol/L) on two separate tests indicates diabetes. Discuss abnormal results with your healthcare provider for diagnosis and individualized management, as targets can vary by age, health status, and pregnancy.

A fasting glucose test in pregnancy measures the blood sugar level after an overnight fast (usually eight to twelve hours) to screen for gestational diabetes or pre-existing diabetes. It’s typically done in early pregnancy or before an oral glucose tolerance test; a high fasting value prompts further testing and treatment. Early detection helps reduce maternal and fetal complications.

Control blood sugar in pregnancy by eating regular balanced meals with controlled carbohydrates and low‑GI choices, limiting sugary foods and refined carbs, and spacing snacks to avoid highs and lows. Monitor glucose as advised and attend prenatal appointments. Stay physically active daily (walking or pregnancy‑safe exercise). If targets aren’t met, follow your care team’s plan for medication or insulin, and maintain healthy weight and hydration.

Yes. Your fasting blood sugar is the concentration of glucose in your blood after you haven’t eaten for about 8 hours. It shows baseline blood glucose and helps screen/diagnose prediabetes and diabetes. Common cutoffs: normal about 70–99 mg/dL, impaired fasting glucose 100–125 mg/dL, and diabetes ≥126 mg/dL on repeated testing.

Best times to check blood sugar are fasting (upon waking, before breakfast) and one to two hours after meals to assess postprandial control. People with diabetes should also test before meals, at bedtime, and when symptomatic or before/after exercise or driving. Frequency and target ranges depend on your treatment plan—follow your healthcare team's recommendations.

Ten warning signs of diabetes include increased thirst and dry mouth, frequent urination especially at night, unexplained weight loss, extreme hunger, persistent fatigue and low energy, blurred or changing vision, slow-healing cuts, frequent yeast or urinary infections, numbness or tingling in hands and feet, and darkened, velvety skin patches (acanthosis nigricans).