Average iron levels in females
Pro Research Analysisby 
Searched over 200M research papers
Average Iron Levels in Females: A Comprehensive Overview
Dietary Iron Intake in Women of Reproductive Age
Iron Intake Across Europe
A comprehensive review of 49 studies from 29 European countries reveals significant variation in dietary iron intake among women of reproductive age. The median/mean iron intake ranges from 7.6-9.9 mg/day in countries like Belgium and Denmark to 15.9-19.0 mg/day in countries such as Croatia and Portugal. Notably, the majority of women in Europe have a dietary iron intake below 15 mg/day, with 61-97% of women falling into this category .
Recommended Daily Allowance (RDA) for Iron
The recommended daily allowance for iron varies by country. In the United Kingdom, the RDA for menstruating women is 14.8 mg, while in the United States, it is 18 mg. For non-menstruating women, the RDA is lower, at 8.7 mg in the UK and 8 mg in the US .
Iron Requirements and Deficiency
Increased Iron Requirements in Adolescents
Adolescent females experience a significant increase in iron requirements due to growth spurts, increased blood volume, and the onset of menstruation. The iron requirements can rise from 0.7-0.9 mg/day in preadolescents to as much as 2.2 mg/day or more in heavily menstruating young women. Despite these increased needs, average iron intake in adolescent girls is often only 10-11 mg/day, leading to a negative iron balance and low iron stores .
Iron Requirements in Menstruating Women
For adult menstruating women, the total absorbed iron requirement is approximately 2.84 mg/day, while for teenagers, it is around 3.21 mg/day. Given the bioavailability of iron in Western diets, the dietary iron requirements are estimated to be 18.9 mg/day for adult women and 21.4 mg/day for teenagers .
Iron Status and Deficiency Indicators
Serum Iron and Hemoglobin Levels
A study of 275 healthy women found that the mean serum iron level was 116 ± 33 µg%, and the mean hemoglobin level was 13.2 ± 0.9 g%. Serum iron levels tend to decrease with age, although this decrease is not accompanied by a reduction in hemoglobin levels .
Iron Deficiency in Adolescent Females
In a study of adolescent females in Sri Lanka, 59% had serum ferritin levels below 12 µg/L, indicating depleted iron stores. Although overt anemia was not common, many subjects were in the early stages of iron deficiency, putting them at risk of developing clinical manifestations of iron deficiency during periods of increased iron demand, such as pregnancy .
Iron Loss Due to Menstrual Blood Loss
Excessive menstrual blood loss is a significant cause of iron-deficient anemia in women of reproductive age. Healthy women with normal menses lose about 1 mg of iron per cycle, whereas women with menorrhagia can lose 5-6 times more iron per cycle. This substantial loss often leads to depleted iron stores and increased risk of anemia .
Conclusion
The average iron intake among women, particularly those of reproductive age, often falls below the recommended levels, leading to widespread iron deficiency. This deficiency is exacerbated by factors such as menstruation and increased iron requirements during adolescence. Addressing this issue requires standardized dietary methods and uniform reference values to ensure adequate iron intake and prevent iron deficiency anemia.
Sources and full results
Most relevant research papers on this topic