Which of the following is a common cause of anemia?

Low dietary intake of iron is a widely recognized cause of anemia, particularly iron deficiency anemia. Iron is a crucial component of hemoglobin, the protein in red blood cells that carries oxygen throughout the body. When dietary iron intake is insufficient, the body cannot produce enough hemoglobin, leading to a decreased number of red blood cells, which defines anemia.

This condition can arise from a variety of dietary habits, such as not consuming enough iron-rich foods (like meat, beans, and fortified cereals) or the presence of factors that inhibit iron absorption, such as excessive calcium intake. While excessive exercise can impact health, it is not a direct contributor to the development of anemia. Similarly, while protein is essential for overall health, increased protein absorption does not directly relate to the prevention or cause of anemia. Hence, a low dietary intake of iron stands out as a common and significant cause of this blood condition.