This is a mineral that is vital for the growth and development of the body. You use iron to make haemoglobin, which is a protein in red blood cells that carries oxygen from the lungs to all parts of the body, and myoglobin, a protein that provides oxygen to muscles. Globally, 1.62 billion individuals have an iron deficiency, which corresponds with 24.8% of the population. If you do not get enough iron, your body cannot produce enough of the substance in red blood cells that enables them to carry oxygen. This can lead to something called iron deficiency anaemia, which is a common type of anaemia. This can lead you to feel extreme fatigue and weakness, even when you are getting enough rest. You may also experience shortness of breath, fast heartbeat, dizziness, brittle nails, and plenty of other unpleasant symptoms. Additionally, iron is needed to create certain hormones in the body.