World Health Organization (WHO) on Twitter: "#IronDeficiency occurs mainly when the requirements of iron increase during rapid periods of growth and development such as in early childhood, adolescence and pregnancy, but it
![Physiologically based serum ferritin thresholds for iron deficiency in children and non-pregnant women: a US National Health and Nutrition Examination Surveys (NHANES) serial cross-sectional study - The Lancet Haematology Physiologically based serum ferritin thresholds for iron deficiency in children and non-pregnant women: a US National Health and Nutrition Examination Surveys (NHANES) serial cross-sectional study - The Lancet Haematology](https://www.thelancet.com/cms/attachment/e0763f9a-a1e3-4bdb-adc1-637446c8edce/gr1.gif)
Physiologically based serum ferritin thresholds for iron deficiency in children and non-pregnant women: a US National Health and Nutrition Examination Surveys (NHANES) serial cross-sectional study - The Lancet Haematology
![Trends in prevalence of iron deficiency/anaemia, by age and gender (%) | Download Scientific Diagram Trends in prevalence of iron deficiency/anaemia, by age and gender (%) | Download Scientific Diagram](https://www.researchgate.net/publication/340655859/figure/fig6/AS:880624214765569@1586968582136/Trends-in-prevalence-of-iron-deficiency-anaemia-by-age-and-gender.png)