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Stable Isotope Values in Human Dentine Collagen and Fingernails Reveal Age-Related and Socioeconomic Dietary Patterns in Brazil.

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Τίτλος: Stable Isotope Values in Human Dentine Collagen and Fingernails Reveal Age-Related and Socioeconomic Dietary Patterns in Brazil.
Συγγραφείς: Emenes JS; Centro de Energia Nuclear Na Agricultura (CENA), Piracicaba, São Paulo, Brazil., Bastos MQR; Department of Anthropology, Museu Nacional, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil., Tinoco R; Department of Anthropology, Museu Nacional, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil., Mascarenhas RO; Brazilian Federal Police, Technical-Scientific Section, Curitiba, Paraná, Brazil., Rumbelsperger AMB; Laboratory of Mineral and Rock Analysis (LAMIR), Department of Geology, Federal University of Paraná, Curitiba, Paraná, Brazil., Ferreira de Lima EL; Faculdade de Enfermagem Nova Esperança, Mossoró, Rio Grande do Norte, Brazil., de Jesus LH; Unifenas, Divinópolis, Minas Gerais, Brazil., Martins RS; UniCatólica, Quixadá, Rio Grande do Norte, Brazil., da Silva CHF; UniCatólica, Quixadá, Rio Grande do Norte, Brazil., Nardoto GB; Department of Ecology, Universidade de Brasília, Brasília, DF, Brazil., Martinelli LA; Centro de Energia Nuclear Na Agricultura (CENA), Piracicaba, São Paulo, Brazil.
Πηγή: American journal of biological anthropology [Am J Biol Anthropol] 2026 Jul; Vol. 190 (3), pp. e70258.
Τύπος έκδοσης: Journal Article; Research Support, Non-U.S. Gov't
Γλώσσα: English
Στοιχεία περιοδικού: Publisher: John Wiley & Sons Inc Country of Publication: United States NLM ID: 101770171 Publication Model: Print Cited Medium: Internet ISSN: 2692-7691 (Electronic) Linking ISSN: 26927691 NLM ISO Abbreviation: Am J Biol Anthropol Subsets: MEDLINE
Imprint Name(s): Original Publication: [Hoboken, NJ] : John Wiley & Sons Inc., [2022]-
Ιατρικοί όροι (MeSH): Collagen*/chemistry , Dentin*/chemistry , Nails*/chemistry , Diet*/statistics & numerical data , Carbon Isotopes*/analysis , Nitrogen Isotopes*/analysis, Humans ; Adult ; Female ; Brazil ; Male ; Middle Aged ; Young Adult ; Socioeconomic Factors ; Aged ; Adolescent
Περίληψη: Objectives: In this study, we analyzed δ13C and δ15N values in dentine collagen (reflecting early-life diet) and fingernail keratin (reflecting recent diet) from 92 living adult individuals, having 75 individuals having paired dentine and fingernail samples available, across Brazilian regions with contrasting socioeconomic conditions. While the sample size was necessarily limited by the availability of paired tissues, it provides a unique dataset for assessing dietary change within the lifespan and its relationship to socioeconomic context.
Materials and Methods: Using Bayesian linear models and self-reported dietary intake questionnaires, we investigated the influence of age, geographic region, and socioeconomic status on isotopic composition.
Results: We found significant regional and socioeconomic effects: individuals from high-Human Development Index (HDI) municipalities and those reporting greater sugar intake had elevated δ13C values, while frequent fish and seafood consumption was associated with higher δ15N. Notably, δ15N in dentine collagen declined with tooth age, suggesting a historical decrease in the δ15N of food sources, likely linked to increased reliance on synthetic fertilizers and nitrogen-fixing crops.
Discussion: Both tissues show a consistent regional contrast: participants from the Southeast exhibit higher δ13C and lower δ15N than those from the Northeast, consistent with greater intake of C4-derived, corn- and sugar-based processed foods ("supermarket diet"') and proportionally lower trophic-level protein in the Southeast, versus lower δ13C in the Northeast consistent with diets centered on C3 staples (rice, beans, manioc) and more limited access to ultra-processed foods.
(© 2026 Wiley Periodicals LLC.)
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Grant Information: 406637/2022-9 Conselho Nacional de Desenvolvimento Científico e Tecnológico; 88881.516433/2020-01 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Contributed Indexing: Keywords: Brazil; dentine; dietary transitions; fingernail; socioeconomic status; stable isotopes
Substance Nomenclature: 9007-34-5 (Collagen)
0 (Carbon Isotopes)
0 (Nitrogen Isotopes)
Entry Date(s): Date Created: 20260630 Date Completed: 20260630 Latest Revision: 20260801
Update Code: 20260801
PubMed Central ID: PMC13421035
DOI: 10.1002/ajpa.70258
PMID: 42374853
Βάση Δεδομένων: MEDLINE
Περιγραφή
ISSN:2692-7691
DOI:10.1002/ajpa.70258