(HealthDay News) -- Anemia occurs when a person has too few red blood cells or insufficient amounts of a vital blood protein called hemoglobin. This means your blood may not be carrying enough oxygen to all parts of your body.

Some types of anemia are preventable, the National Women's Health Information Center says. It offers these suggestions:

• Eat plenty of iron-rich foods, such as tofu, green and leafy vegetables, lean red meat, lentils, beans and iron-fortified cereals and breads.
• Eat and drink vitamin C-rich foods and drinks.
• Avoid drinking tea or coffee with your meals, as they can affect iron absorption.
• Get enough vitamin B12 and folic acid in your diet.