Cited by 357Per- and polyfluoroalkyl substances researchToxic Organic Pollutants ImpactFluorine in Organic Chemistry

Multiple pathways of human exposure to poly- and perfluoroalkyl substances (PFASs): From external exposure to human blood

Open access
Poothong, Somrutai, Papadopoulou, Eleni, Padilla-Sánchez, Juan Antonio, Thomsen, Cathrine, Haug, Line Småstuen·2020·Environment International

Abstract

Exposure to PFASs may result in adverse health effects. This study aimed to characterise the exposure to PFASs from diet, house dust, indoor air, and dermal contact and the relative contribution from different external exposure pathways to human serum concentrations. Daily intakes of 18 perfluoroalkyl acids (PFAAs) and 12 PFAA precursors from diet, dust ingestion, inhalation of indoor air and dermal absorption were estimated using a comprehensive dataset comprising 61 adults from the Oslo area, Norway. Concentrations of PFAAs and PFAA precursors in house dust, indoor air, hand wipes, foods and drinks were utilised to estimate the daily intakes. Perfluorooctanesulfonate (PFOS) was the predominant PFAS in serum for this study group. On a median level, perfluorooctanoate (PFOA) contributed most to the total estimated daily intake of PFAAs, with a median intake of 280 (range: 72–1810) pg·kg bw −1 ·day −1 , covering both direct and indirect (precursors) exposure. Out of this, only 3% (range: <1–48%) of the total PFOA intake came from indirect exposure. Dietary exposure from ingestion of food and drinks was in general the predominant exposure pathway, followed by exposure from ingestion of house dust, inhalation of indoor air, and dermal absorption, but considerable variations were observed among individuals. House dust ingestion and indoor air inhalation contributed most to the total intakes for some participants, for which most of them were among the 20% participants with the highest total estimated intakes. Some statistical significant associations between concentrations of PFASs measured in serum and estimated intakes were observed. Measured serum concentrations and modelled serum concentrations based on external exposure estimates were in the same order of magnitude for PFOS, PFHxS, PFOA, and PFNA, but only PFOA concentrations were comparable, 1.9 and 2.0 ng mL −1 for observed and modelled serum concentrations, respectively. The estimated daily intakes of PFASs in this study were lower than the health-based guidance values, e.g. the tolerable weekly intakes derived by EFSA. This study underlines the importance of performing studies considering multiple exposure pathways on an individual basis.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1016/j.envint.2019.105244

Cites

46 of 46 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Breastfeeding has been identified as a significant route for early-life PFAS exposure, which can contribute to higher levels in infants compared to adults.

    “Breastfeeding has been identified as a significant route for early-life PFAS exposure, which can contribute to higher levels in infants compared to adults [178,179].”

    From Industrial Applications, Environmental Fate, Human Exposure, and Health Effects of PFAS (2025) · cites this paper as [179]

    The Conclusions describe PFAS exposure pathways measured in Norwegian adults, and the Population characteristics section reports blood concentrations by adult age group. Our copy does not address breastfeeding as an exposure route or compare PFAS levels in infants and adults (searched: breastfeeding, breast milk, lactation, infant, early-life exposure). (LLM, conf=0.74)

    Experimental — accuracy not yet measured

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Research works printed but not linked: 2

  1. Butt, C.M., Muir, D.C.G., mabury, S.A., 2014. Biotransformation partways of fluor- otelomer-based polyfluoroalkyl substances: a review. Environ. Toxicol. Chem. 33 (2), 243-267.
  2. U.S. EPA, 2011. Exposure Factors Handbook: 2011 Edition Vol. EPA/600/R-09/052F.

Cited by

Sorted by citations

Authors
Poothong, S., Papadopoulou, E., Padilla-Sánchez, J. A., Thomsen, C., & Haug, L. S.
Affiliations
Norwegian Institute of Public Health (NO)
Corresponding author
Poothong, Somrutai
Venue
Environment International
Publisher
Elsevier BV
Published
2020-01
Volume
134
Pages
105244
ISSN
0160-4120 (ISSN-L)
OpenAlex
W2982787986
Cited by
357
References
46
Citations by year
2026: 63 · 2025: 69 · 2024: 68 · 2023: 44 · 2022: 45 · 2021: 43 · 2020: 25
FWCI
12.29
Type
journal article
Language
en
Open access
Locations
  • Environment International (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • NORA - Norwegian Open Research Archives (submittedVersion, other-oa)
Funders
  • Norges Forskningsråd
  • FP7 People: Marie-Curie Actions
Topics
  • Physical Sciences › Environmental Science › Environmental Chemistry › Per- and polyfluoroalkyl substances research
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Toxic Organic Pollutants Impact
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmaceutical Science › Fluorine in Organic Chemistry
Keywords
per- and polyfluoroalkyl substances, dietary exposure, percutaneous absorption, perfluorooctanoic acid, PFOS, serum PFAS concentrations, daily intake estimation, tolerable weekly intake
MeSH terms
Dust, Environmental Exposure, Environmental Pollutants, Fluorocarbons, Humans, Norway, Alkanesulfonic Acids

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review