Get rid of some of the iron it contains, and which, if increased level of blood increases the risk of heart disease, as iron accelerates the oxidation of cholesterol and increases the small damage Alhrain.

Those who donate their blood once at least every year they are less susceptible to circulatory disease and leukemia

Donating blood stimulates the bone marrow (which is the only body in charge of the formation of blood cells), while normal human blood is renewed every 120 days, and regular blood donor is renewed every 20 days only six times faster