Are you getting enough iron in your diet? Iron is a powerful mineral that keeps your skin, hair and nails healthy, produces red blood cells and improves a number of important bodily functions. However, despite its importance, more than 3 million Americans suffer from an iron deficiency. Iron deficiency is the most common nutritional deficiency, especially among children and pregnant women. Ultimately, it can lead to iron deficiency anemia, decreased immunity to illnesses and infections and even premature delivery in pregnant women.