Cited by 2,786Per- and polyfluoroalkyl substances researchSynthesis and properties of polymersToxic Organic Pollutants Impact

A review of the pathways of human exposure to poly- and perfluoroalkyl substances (PFASs) and present understanding of health effects

Open access
Sunderland, Elsie M., Hu, Xindi C., Dassuncao, Clifton, Tokranov, Andrea K., Wagner, Charlotte C., Allen, Joseph G.·2019·Journal of Exposure Science & Environmental Epidemiology

Abstract

Here, we review present understanding of sources and trends in human exposure to poly- and perfluoroalkyl substances (PFASs) and epidemiologic evidence for impacts on cancer, immune function, metabolic outcomes, and neurodevelopment. More than 4000 PFASs have been manufactured by humans and hundreds have been detected in environmental samples. Direct exposures due to use in products can be quickly phased out by shifts in chemical production but exposures driven by PFAS accumulation in the ocean and marine food chains and contamination of groundwater persist over long timescales. Serum concentrations of legacy PFASs in humans are declining globally but total exposures to newer PFASs and precursor compounds have not been well characterized. Human exposures to legacy PFASs from seafood and drinking water are stable or increasing in many regions, suggesting observed declines reflect phase-outs in legacy PFAS use in consumer products. Many regions globally are continuing to discover PFAS contaminated sites from aqueous film forming foam (AFFF) use, particularly next to airports and military bases. Exposures from food packaging and indoor environments are uncertain due to a rapidly changing chemical landscape where legacy PFASs have been replaced by diverse precursors and custom molecules that are difficult to detect. Multiple studies find significant associations between PFAS exposure and adverse immune outcomes in children. Dyslipidemia is the strongest metabolic outcome associated with PFAS exposure. Evidence for cancer is limited to manufacturing locations with extremely high exposures and insufficient data are available to characterize impacts of PFAS exposures on neurodevelopment. Preliminary evidence suggests significant health effects associated with exposures to emerging PFASs. Lessons learned from legacy PFASs indicate that limited data should not be used as a justification to delay risk mitigation actions for replacement PFASs.

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Registry

Crossref · 10.1038/s41370-018-0094-1

Cites

153 of 153 references verified0 citation errors · 0 not checkable

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  • Dietary exposure through drinking water and contaminated food is among the largest PFAS exposure sources for both ecosystems and humans.

    “PFAS exposures via food chains are more difficult to resolve, and dietary exposure through drinking water and contaminated food sources (e.g., seafood and other animal products) are among the greatest exposure sources for ecosystems and human populations alike (109, 111).”

    From Per- and polyfluoroalkyl substances in the environment (2022) · cites this paper as [109]

    The ‘Approaches for quantifying exposure sources’ section (page unavailable) says dietary intake is generally the largest source of human PFAS exposure and identifies drinking water, seafood, and other animal products as important sources, with contributions varying by population. The paper discusses PFAS accumulation in marine food chains, but does not establish that dietary exposure is among the greatest PFAS exposure sources for ecosystems. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Waterborne rather than dietary exposure was associated with lower amphipod survival and reproduction, while higher trophic-level organisms are exposed mainly by ingestion.

    “Solubilized (i.e., waterborne) rather than dietary exposure was linked to reduced amphipod survival and reproduction (133) while higher trophic-level organisms are exposed primarily through ingestion (109).”

    From Per- and polyfluoroalkyl substances in the environment (2022) · cites this paper as [109]

    Citation (109) is attached to the claim about higher trophic-level organisms, not the amphipod finding. In “Approaches for quantifying exposure sources” (page unavailable), the review says dietary intake is generally the largest PFAS exposure source for human adults. It does not establish that ingestion is the primary exposure route for higher trophic-level organisms generally. (LLM, conf=0.83)

    Experimental — accuracy not yet measured
  • Fluoropolymer manufacturing plants, wastewater treatment plants, landfills, and military bases are major sources of PFAS pollution in the environment.

    “Fluoropolymer manufacturing plants, wastewater treatment plants [10,11], landfills, and military bases [89,90] are major sources of PFAS pollution in the environment.”

    From Industrial Applications, Environmental Fate, Human Exposure, and Health Effects of PFAS (2025) · cites this paper as [90]

    The Introduction and Drinking water section link PFAS contamination to military bases and fluoropolymer manufacturing facilities. The Biosolids and agriculture section explicitly calls wastewater treatment plants point sources, but mentions landfills only as destinations for PFAS-containing sludge; it does not establish landfills as major pollution sources. Page numbers are not available in our copy. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • PFASs can activate PPARα, disrupt nuclear receptor signaling, and interfere with genes regulating lipid and cholesterol homeostasis.

    “Mechanistically, PFASs can activate peroxisome proliferatoractivated receptor alpha (PPAR α ), disrupt nuclear receptor signaling, and interfere with genes regulating lipid and cholesterol homeostasis.”

    From Industrial Applications, Environmental Fate, Human Exposure, and Health Effects of PFAS (2025) · cites this paper as [90]

    The Metabolic effects section (page unavailable) links PFAS exposure to dyslipidemia and identifies PPAR-alpha as a nuclear receptor involved in a possible toxicological pathway. It does not establish that PFASs activate PPAR-alpha, disrupt nuclear receptor signaling, or interfere with genes regulating lipid and cholesterol homeostasis. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • PFAS exposure leads to immune suppression, with multiple studies reporting significant associations between PFAS exposure and reduced immune function, particularly in children.

    “Furthermore, PFAS exposure leads to immune suppression, with multiple studies reporting significant associations between PFAS exposure and reduced immune function, particularly in children.”

    From Industrial Applications, Environmental Fate, Human Exposure, and Health Effects of PFAS (2025) · cites this paper as [90]

    The Immune effects section reports that four of five vaccination-response studies found statistically significant associations between higher PFAS exposure and suppressed immune response, including findings in children. It also describes the human epidemiological evidence as mounting and the causal interpretation as conditional (Academic studies section: “If this effect is causal”). Thus, the claim's statement that PFAS exposure *leads to* immune suppression is stronger than the review establishes for humans. (LLM, conf=0.88)

    Experimental — accuracy not yet measured

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Cites

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Research works printed but not linked: 6

  1. [76]Haug LS, Huber S, Becher G, Thomsen C Characterisation of human exposure pathways to perfluorinated compounds—comparing exposure estimates with biomarkers of exposure. Environment International 2011; 37: 687– 693. 21334069
  2. [96]Yeung LW, Miyake Y, Taniyasu S, Wang Y, Yu H, So MK Perfluorinated Compounds and Total and Extractable Organic Fluorine in Human Blood Samples from China. Environmental Science & Technology 2008; 42: 8140– 8145. 19031915
  3. [98]Ritter SK FLUOROCHEMICALS GO SHORT. Chemical & Engineering News Archive 2010; 88: 12– 17.
  4. [108]Pathology Associates International. Pathology Review of Reported Tumorigenesis in a Two Year Study of FM-3924 in Rats. Available on U.S. EPA public docket AR-226–0264.: West Chester, Ohio, 1998.
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Authors
Sunderland, E. M., Hu, X. C., Dassuncao, C., Tokranov, A. K., Wagner, C. C., & Allen, J. G.
Affiliations
Harvard University (US)
Corresponding author
Sunderland, Elsie M.
Venue
Journal of Exposure Science & Environmental Epidemiology
Published
2018-11-23
Volume
29
Issue
2
Pages
131-147
ISSN
  • 1559-0631 (ISSN-L)
  • 1559-064X
OpenAlex
W2901377336
Cited by
2,786
References
153
Citations by year
2026: 540 · 2025: 586 · 2024: 483 · 2023: 382 · 2022: 328 · 2021: 249 · 2020: 180 · 2019: 34
FWCI
9.74
Type
journal article
Language
en
Open access
Locations
  • Journal of Exposure Science & Environmental Epidemiology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • U.S. Environmental Protection Agency
  • National Institute for Health and Care Research
  • National Health Research Institutes
  • National Institute of Environmental Research
  • National Institutes of Health
  • National Institute of Environmental Health Sciences (P30ES000002, P42ES027706)
Topics
  • Physical Sciences › Environmental Science › Environmental Chemistry › Per- and polyfluoroalkyl substances research
  • Physical Sciences › Materials Science › Polymers and Plastics › Synthesis and properties of polymers
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Toxic Organic Pollutants Impact
Keywords
per- and polyfluoroalkyl substances, human exposure, emerging PFASs, PFAS precursors, seafood contamination, drinking water contamination, groundwater contamination, aqueous film-forming foam, food packaging, indoor air exposure, cancer risk, immune function, dyslipidemia, brain development, serum PFAS concentrations, risk mitigation
MeSH terms
Environmental Exposure, Environmental Pollutants, Fluorocarbons, Humans, Water Pollutants, Chemical, Water Pollution, Chemical, Groundwater, Drinking Water

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