People with iron deficiency most commonly complain of extreme tiredness and fatigue, especially towards the afternoon and even just after waking up from a good night’s sleep.
 

Breathlessness, a racing heart (palpitations), restless, twitching or aching legs, brain ‘fog’ (difficulty concentrating), dizziness and wanting desperately to eat ice are also common.
 

Many people with iron deficiency complain of their hair falling out in the shower or when brushing it, and of ridging of their nails, as well as lack of libido. In severe cases, iron deficiency is associated with depression, anixiety and repeated infections and illnesses.