Evidence map›Paper›PMID 37592132›Full record

ArticleEuropean journal of nutrition2023

Thyroid function and urinary concentrations of iodine, selenium, and arsenic in vegans, lacto-ovo vegetarians and pescatarians.

Sigrun Henjum, Synne Groufh-Jacobsen, Inger Aakre, Elin Lovise Folven Gjengedal, Mina Marthinsen Langfjord, Espen Heen, Veronika Sele, Maria Andersson

Open access · hybridAbstract read
In one paragraph

Article in European journal of nutrition, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed, 1 pooled it
2.0field-weighted citation impact, top 12% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

11 citing papers in PubMed, 1 synthesis or guideline pooled it, 10 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. The role of nutrition on thyroid health and disease: myths and facts.Journal of endocrinological investigation · 2026
    Review
  4. Article
  5. Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 6 institutions in 2 countries.

Sigrun HenjumDepartment of Nursing and Health Promotion, Faculty of Health Sciences, Oslo Metropolitan University, Kunnskapsveien 55, 2007 Kjeller, 0130, Oslo, Norway. shenjum@oslomet.no.ORCID http://orcid.org/0000-0002-0671-2688
Synne Groufh-JacobsenDepartment of Nutrition and Public Health, Faculty of Health and Sport Science, University of Agder, Universitetsveien 25, 4630, Kristiansand, Norway.ORCID http://orcid.org/0000-0001-8757-5111
Inger AakreDepartment of Marine Toxicology, Institute of Marine Research, 5817, Bergen, Norway.ORCID http://orcid.org/0000-0002-3046-1823
Elin Lovise Folven GjengedalFaculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, 1432, Ås, Norway.ORCID http://orcid.org/0000-0002-7771-0153
Mina Marthinsen LangfjordFaculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, 1432, Ås, Norway.
Espen HeenInstitute of Health and Society, Medical Faculty, University of Oslo, Oslo, Norway.
Veronika SeleDepartment of Marine Toxicology, Institute of Marine Research, 5817, Bergen, Norway.
Maria AnderssonNutrition Research Unit, University Children's Hospital Zurich, Steinwiesstrasse 75, 8032, Zurich, Switzerland.ORCID http://orcid.org/0000-0003-4859-1383
Norwegian Institute of Marine Research · NONorwegian University of Life Sciences · NOOsloMet – Oslo Metropolitan University · NOUniversity Children's Hospital Zurich · CHUniversity of Agder · NOUniversity of Oslo · NO

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposePopulations following a plant-based diet may be at particular risk of thyroid dysfunction due to low iodine and selenium intakes. The main purpose was to assess thyroid function and urinary concentration of iodine, selenium, and arsenic, in subjects following a vegan, lacto-ovo vegetarian, or pescatarian diet.

methodsIn Norway, a country without mandatory dietary iodine fortification, 205 adults, following vegan (n = 115), lacto-ovo vegetarian (n = 55) and pescatarian diet (n = 35) were included. Thyroglobulin (Tg), thyroid-stimulating hormone (TSH), free triiodothyronine (fT3), free thyroxine (fT4), and serum anti-TPO (S-anti-TPO) were measured in a venous blood sample and concentrations of iodine (UIC), creatinine (UCC), selenium, and arsenic were measured from single spot urine samples.

resultsSubclinical hypothyroidism (TSH > 4.0 mU/L) was observed in 3% of subjects. The overall median (p25, p75) Tg was 17 (9, 30) µg/L and vegans had higher Tg compared to pescatarians. Vegans not consuming iodine-containing supplements (n = 43) had higher Tg, than supplement users (n = 72), 27 (11, 44) vs. 16 (8, 25) µg/L and higher fT4, 16 (15, 17) vs. 15 (14, 17) pmol/L, respectively. The overall median UIC was 57 (28, 130) µg/L, all dietary groups had median UIC below WHO thresholds. Median urinary selenium and arsenic concentration was 13 (6, 22) and 3 (2, 8) µg/L, respectively.

conclusionThe prevalence of subclinical hypothyroidism was low and fT4 and fT3 were within the normal range for all dietary groups. Vegans had significantly increased Tg compared to pescatarians.

Indexed as

ArsenicHypothyroidismIodineSeleniumAdultHumansThyrotropinThyroxineVegansVegetariansArsenicIodineSeleniumThyrotropinThyroxineArsenicIodinePlant-based dietSeleniumThyroglobulinThyroid hormonesUrinary iodine

Identifiers

PMID37592132
PMCPMC10611878
OpenAlexW4385955432

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.