Healthy Blood Sugar Ranges for Adults Over 30: A Comprehensive Guide

Normal Blood Sugar Ranges

- Fasting blood sugar: Less than 100 mg/dL (5.6 mmol/L)

- Postprandial blood sugar (2 hours after eating): Less than 140 mg/dL (7.8 mmol/L)

Prediabetes

- Fasting blood sugar: Between 100 and 125 mg/dL (5.6 and 7 mmol/L)

- Postprandial blood sugar: Between 140 and 199 mg/dL (7.8 and 11.1 mmol/L)

Diabetes

- Fasting blood sugar: 126 mg/dL (7 mmol/L) or higher

- Postprandial blood sugar: 200 mg/dL (11.1 mmol/L) or higher

Hypoglycemia

- Blood sugar: Less than 70 mg/dL (3.9 mmol/L)