Iron is used in the blood to transport oxygen – this is why you’ll see people with an iron deficiency bleed and bruise more. Low iron means your body has a hard time getting oxygen around. Zinc is also used in wound healing, as well as taste sensation, metabolism regulation and overall growth.
Iron is crucial for respiration: it is the iron proteins that capture the energy released from the oxidation of food. (For precise details on how this works, check this article: http://www.plosbiology.org/article/info:doi/10.1371/journal.pbio.0000079)
Apart from oxygen transport, iron is also important in the regulation of cell growth and differentiation.
Without it, the oxygen supply to your cells is limited and this affects adversely your health by decreasing your immune function, as well as leaving you feeling tired and weak overall.
2) Zinc Without zinc, your immune system cannot defend you effectively against bacteria and viruses. It is also a necessary nutrient for the healing of wounds.
Moreover, zinc is used to make proteins and DNA: without it, the proper development of an individual might be at risk.
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