The central and most important part of an object, movement, or group, forming the basis for its activity and growth.
Iron supplements may be used in treating anemia and is
commonly used by athletes. However, the kind of anemia that athletes experience
is a little different because it tends to be exercise-induced due to their
heavy training. In this case, iron may be ineffective in raising hemoglobin
concentrations because of the exercise-induced decrease in iron absorption.
