IRON: Lack of iron causes your body to produce fewer, less healthy red blood cells, which leads to anaemia, according to the DHA. This can lead to fatigue, shortness of breath and decreased immune function, meaning that you will probably find yourself getting sick more often than usual. Other key signs of iron deficiency are soft, ‘spooned’ fingernails, which dip in the middle and curve up at the edge, as well as pale skin.
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