Iron and folic acid play a key role in performing some important functions in the human body. Iron is an important mineral that is essential for proper development and growth of the human body. Iron aids in metabolizing proteins and it also plays a key role in the formation of Red Blood Cells(RBCs) and haemoglobin in the body and helps the RBCs transport oxygen throughout the body. Iron deficiency can lead to chronic anemia, insomnia, fatigue, cough and also lack of concentration, and compromised immune functions.