Changes

Iron is found within each haem component of haemoglobin and binds oxygen.

Iron is found within each haem component of haemoglobin and binds oxygen.

===Folic acid and vitamin B12===

===Folic acid and vitamin B12===

These elements are required for DNA synthesis and are important for the formation of new erythrocytes. Deficiencies leads to the formation of '''macrocytes''', which are enlarged erythrocytes with a higher than normal MCV.

These elements are required for DNA synthesis and are important for the formation of new erythrocytes. Deficiencies leads to the formation of '''macrocytes''', which are enlarged erythrocytes with a higher than normal mean corpuscular volume (MCV).

==Regulation==

==Regulation==