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Iron insight : exploring dietary patterns and iron deficiency among teenage girls in Sweden

Stubbendorff, Anna LU orcid ; Borgström Bolmsjö, Beata LU ; Bejersten, Tomas LU ; Warensjö Lemming, Eva ; Calling, Susanna LU and Wolff, Moa LU (2025) In European Journal of Nutrition 64(3).
Abstract

PURPOSE: This observational study examined the relationship between self-reported dietary patterns-omnivore, pescatarian, vegetarian, and vegan-and iron status among Swedish teenage girls. Additionally, we compared the consumption of various food groups in relation to iron status.

METHODS: Data were collected from 475 female high school students in Malmö and Lund, Sweden, using questionnaires on dietary habits, iron supplementation, and demographic factors. Participants were classified into dietary groups: 347 omnivores, 38 pescatarians, 27 non-consumers of red meat, 60 vegetarians and 3 vegans. Blood samples were analysed for ferritin and haemoglobin levels to determine iron status. Iron deficiency was defined as ferritin < 15... (More)

PURPOSE: This observational study examined the relationship between self-reported dietary patterns-omnivore, pescatarian, vegetarian, and vegan-and iron status among Swedish teenage girls. Additionally, we compared the consumption of various food groups in relation to iron status.

METHODS: Data were collected from 475 female high school students in Malmö and Lund, Sweden, using questionnaires on dietary habits, iron supplementation, and demographic factors. Participants were classified into dietary groups: 347 omnivores, 38 pescatarians, 27 non-consumers of red meat, 60 vegetarians and 3 vegans. Blood samples were analysed for ferritin and haemoglobin levels to determine iron status. Iron deficiency was defined as ferritin < 15 µg/L, and anaemia as haemoglobin < 110 g/L if < 19 years and < 117 g/L if ≥ 19 years. ANOVA and logistic regression were used to compare biomarker levels and the prevalence of iron deficiency and anaemia across dietary groups.

RESULTS: Omnivores had the highest estimated ferritin levels (19.6 µg/L), which was significantly higher than pescatarians (14.7 µg/L, p = 0.03), and vegans/vegetarians (10.9 µg/L, p < 0.001). Overall 38.1% of participants were iron deficient. Vegetarians/vegans and pescatarians were significantly more likely to be iron deficient (69.4%, p < 0.001 and 49.4%, p-value 0.016, respectively) compared to omnivores (30.5%). Lower red meat consumption and higher intake of vegetarian patties and legumes were linked to an increased risk of iron deficiency. Anaemia prevalence (haemoglobin < 110 g/L if < 19 years and < 117 g/L if ≥ 19 years) was 3% across all dietary groups.

CONCLUSION: This study highlights a higher prevalence of iron deficiency among Swedish teenage girls adhering to plant-based diets. Public health strategies should promote balanced diets that ensure adequate iron intake and absorption while considering environmental sustainability. Regular screening and targeted dietary recommendations are essential for supporting the health of this population.

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; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Humans, Female, Adolescent, Sweden/epidemiology, Anemia, Iron-Deficiency/epidemiology, Ferritins/blood, Diet/statistics & numerical data, Hemoglobins/analysis, Diet, Vegetarian/statistics & numerical data, Iron/blood, Feeding Behavior, Iron Deficiencies, Prevalence, Surveys and Questionnaires, Iron, Dietary/administration & dosage, Nutritional Status, Dietary Patterns
in
European Journal of Nutrition
volume
64
issue
3
article number
107
publisher
Springer
external identifiers
  • scopus:86000074972
  • pmid:40035857
ISSN
1436-6215
DOI
10.1007/s00394-025-03630-z
language
English
LU publication?
yes
additional info
© 2025. The Author(s).
id
c8e7a74b-c300-4f89-8905-395f5950046a
date added to LUP
2025-03-09 19:46:36
date last changed
2025-07-09 13:03:20
@article{c8e7a74b-c300-4f89-8905-395f5950046a,
  abstract     = {{<p>PURPOSE: This observational study examined the relationship between self-reported dietary patterns-omnivore, pescatarian, vegetarian, and vegan-and iron status among Swedish teenage girls. Additionally, we compared the consumption of various food groups in relation to iron status.</p><p>METHODS: Data were collected from 475 female high school students in Malmö and Lund, Sweden, using questionnaires on dietary habits, iron supplementation, and demographic factors. Participants were classified into dietary groups: 347 omnivores, 38 pescatarians, 27 non-consumers of red meat, 60 vegetarians and 3 vegans. Blood samples were analysed for ferritin and haemoglobin levels to determine iron status. Iron deficiency was defined as ferritin &lt; 15 µg/L, and anaemia as haemoglobin &lt; 110 g/L if &lt; 19 years and &lt; 117 g/L if ≥ 19 years. ANOVA and logistic regression were used to compare biomarker levels and the prevalence of iron deficiency and anaemia across dietary groups.</p><p>RESULTS: Omnivores had the highest estimated ferritin levels (19.6 µg/L), which was significantly higher than pescatarians (14.7 µg/L, p = 0.03), and vegans/vegetarians (10.9 µg/L, p &lt; 0.001). Overall 38.1% of participants were iron deficient. Vegetarians/vegans and pescatarians were significantly more likely to be iron deficient (69.4%, p &lt; 0.001 and 49.4%, p-value 0.016, respectively) compared to omnivores (30.5%). Lower red meat consumption and higher intake of vegetarian patties and legumes were linked to an increased risk of iron deficiency. Anaemia prevalence (haemoglobin &lt; 110 g/L if &lt; 19 years and &lt; 117 g/L if ≥ 19 years) was 3% across all dietary groups.</p><p>CONCLUSION: This study highlights a higher prevalence of iron deficiency among Swedish teenage girls adhering to plant-based diets. Public health strategies should promote balanced diets that ensure adequate iron intake and absorption while considering environmental sustainability. Regular screening and targeted dietary recommendations are essential for supporting the health of this population.</p>}},
  author       = {{Stubbendorff, Anna and Borgström Bolmsjö, Beata and Bejersten, Tomas and Warensjö Lemming, Eva and Calling, Susanna and Wolff, Moa}},
  issn         = {{1436-6215}},
  keywords     = {{Humans; Female; Adolescent; Sweden/epidemiology; Anemia, Iron-Deficiency/epidemiology; Ferritins/blood; Diet/statistics & numerical data; Hemoglobins/analysis; Diet, Vegetarian/statistics & numerical data; Iron/blood; Feeding Behavior; Iron Deficiencies; Prevalence; Surveys and Questionnaires; Iron, Dietary/administration & dosage; Nutritional Status; Dietary Patterns}},
  language     = {{eng}},
  month        = {{03}},
  number       = {{3}},
  publisher    = {{Springer}},
  series       = {{European Journal of Nutrition}},
  title        = {{Iron insight : exploring dietary patterns and iron deficiency among teenage girls in Sweden}},
  url          = {{http://dx.doi.org/10.1007/s00394-025-03630-z}},
  doi          = {{10.1007/s00394-025-03630-z}},
  volume       = {{64}},
  year         = {{2025}},
}