Iron deficiency is the most common nutrient deficiency worldwide. A lack of understanding of iron certainly contributes to this statistic, especially considering that the issue can easily be addressed with proper food consumption. On average, the body absorbs approximately 15 percent of iron from food. Interestingly, the exact amount of iron absorption from food by the body depends on the amount of iron already stored in the body. When the body is low in iron, it absorbs more iron from food, and when the body is high in iron, the amount of iron absorbed from food decreases. To fulfill the amount of iron your body needs and optimize the amount of iron your body absorbs, focus on a balanced diet that includes foods high in iron.