Explore normal blood sugar levels by age, plus how it links to your overall health and signs of abnormal glucose levels , according to experts. A normal blood sugar range for a healthy adult (male or female) after 8 hours of fasting is 70-100 mg/dL. Stay on top of your health with a blood sugar levels chart by age. Discover normal ranges for 40, 50, and 70-year-olds to help manage your blood sugar and prevent complications. Learn how blood sugar levels vary by age and what factors affect them. Find out the symptoms, causes, and complications of high and low blood sugar levels, and how to monitor them.
