DEAR DOCTOR K: I'm a man in my 50s, and I've been feeling run-down. Is it possible I'm not getting enough iron in my diet?
DEAR READER: Many patients ask me this question. I think it has to do with an old commercial for a popular vitamin and mineral supplement to treat iron-poor "tired blood." Iron helps make hemoglobin. That's the molecule that grabs oxygen in the lungs and transports it around the body to release it as a source of energy to the cells in the body. The USDA recommends that adult men get 8 milligrams of iron per day in their diets.