Symptoms of iron deficiency include: Tiredness and lethargy, difficulty concentrating and a shortened attention span. The Food Standards Authority recommends that women consume 14.8mg of iron a day (for men it is is 8.7mg per day). A can of Fish4Ever sardines, whole or fillets, with two slices of wholemeal bread will give you around 8mg of iron – just over 50% of the recommended daily iron intake (RDI). The sardines are available from Asda, Ocado, selected Waitrose and all good food shops and delis.