Diabetes affects more than 18 million Americans. Yet many people don't even know they have it.

Diabetes is a condition that affects the way the body uses energy in food. People who have diabetes have trouble controlling their blood sugar levels. Common symptoms of diabetes include fatigue, increased thirst and urination, infections and cuts that don't heal, blurred vision, hunger and weight loss.

Diabetes is often detected by a urine test. If positive, blood glucose readings are taken to measure blood sugar levels. Everyone age 45 and over should have a blood glucose test every three years.

If you have diabetes, manage how you eat, refuel with foods regularly, incorporate physical activity into your daily routine and control your weight. If you need help developing a plan that works for you, contact a registered dietitian.

• Special Section: Diabetes Awareness Month