High-resolution Isotopic Data Link Settlement Complexification to Infant Diets Within the Roman Empire

Overview

Journal PNAS Nexus

Date 2025 Jan 15

PMID 39811446

Authors

Carlo Cocozza

Alison J T Harris

Giulia Formichella

Giulia Pedrucci

Paola F Rossi

Alessandro DAlessio

Valeria Amoretti

Gabriel Zuchtriegel

Michelle OReilly

Noemi Mantile

Sofia Panella

Mary A Tafuri

Simona Altieri

Maria R di Cicco

Ricardo Fernandes

Carmine Lubritto

Affiliations

Soon will be listed here.

Abstract

Our study explores the potential relationship between infant feeding practices and settlement complexity in the Roman Empire through high-resolution Bayesian-modeled stable isotope measurements from incremental dentine. We compiled isotopic data from permanent first molars of individuals from various Roman sites: five from Bainesse (UK), 30 from Thessaloniki (Greece), along with new carbon and nitrogen isotope analyses from four individuals from Pompeii and six from Ostia Via del Mare (AVM). Our results reveal significant inter-site variability in breastfeeding durations, ranging from 1.5 years to approximately 5 years. Notably, individuals from the highly complex urban centers of Pompeii and Thessaloniki ceased breastfeeding around or below the 2-year weaning threshold recommended by Roman physicians. In contrast, individuals from the rural site of Ostia AVM and the site of Bainesse, near the northern frontier of the Roman Empire, generally ceased breastfeeding after 2 years of age. The link between settlement complexity and duration of breastfeeding observed in our study may have resulted from adherence to medical guidelines, support infrastructures, and/or strategies to mitigate financial constraints within households.

References

Paramashanti B, Dibley M, Huda T, Alam A . Breastfeeding perceptions and exclusive breastfeeding practices: A qualitative comparative study in rural and urban Central Java, Indonesia. Appetite. 2022; 170:105907. DOI: 10.1016/j.appet.2021.105907. View

Kadakia K, Galea S . Urbanization and the Future of Population Health. Milbank Q. 2023; 101(S1):153-175. PMC: 10126956. DOI: 10.1111/1468-0009.12624. View

Szucs K . American Academy of Pediatrics Section on Breastfeeding. J Hum Lact. 2011; 27(4):378-9. DOI: 10.1177/0890334411422704. View

Michaelsen K, Lauritzen L, Mortensen E . Effects of breast-feeding on cognitive function. Adv Exp Med Biol. 2009; 639:199-215. DOI: 10.1007/978-1-4020-8749-3_15. View

Neves P, Gatica-Dominguez G, Rollins N, Piwoz E, Baker P, Barros A . Infant Formula Consumption Is Positively Correlated with Wealth, Within and Between Countries: A Multi-Country Study. J Nutr. 2019; 150(4):910-917. PMC: 7138652. DOI: 10.1093/jn/nxz327. View

Tonne C, Adair L, Adlakha D, Anguelovski I, Belesova K, Berger M . Defining pathways to healthy sustainable urban development. Environ Int. 2020; 146:106236. DOI: 10.1016/j.envint.2020.106236. View

Fernandes R, Grootes P, Nadeau M, Nehlich O . Quantitative diet reconstruction of a Neolithic population using a Bayesian mixing model (FRUITS): The case study of Ostorf (Germany). Am J Phys Anthropol. 2015; 158(2):325-340. DOI: 10.1002/ajpa.22788. View

Prowse T, Schwarcz H, Saunders S, Macchiarelli R, Bondioli L . Isotopic evidence for age-related variation in diet from Isola Sacra, Italy. Am J Phys Anthropol. 2005; 128(1):2-13. DOI: 10.1002/ajpa.20094. View

Hamilton W, Tarasenko Y . Breastfeeding Practices in Georgia: Rural-Urban Comparison and Trend Analyses Based on 2004-2013 PRAMS Data. J Rural Health. 2019; 36(1):17-26. DOI: 10.1111/jrh.12382. View

10.

Prowse T, Saunders S, Schwarcz H, Garnsey P, Macchiarelli R, Bondioli L . Isotopic and dental evidence for infant and young child feeding practices in an imperial Roman skeletal sample. Am J Phys Anthropol. 2008; 137(3):294-308. DOI: 10.1002/ajpa.20870. View

11.

Chen X, Orom H, Hay J, Waters E, Schofield E, Li Y . Differences in Rural and Urban Health Information Access and Use. J Rural Health. 2018; 35(3):405-417. PMC: 6522336. DOI: 10.1111/jrh.12335. View

12.

. Breastfeeding and the use of human milk. Pediatrics. 2012; 129(3):e827-41. DOI: 10.1542/peds.2011-3552. View

13.

Beaumont J, Montgomery J . Oral histories: a simple method of assigning chronological age to isotopic values from human dentine collagen. Ann Hum Biol. 2015; 42(4):407-14. DOI: 10.3109/03014460.2015.1045027. View

14.

Dupras T, Tocheri M . Reconstructing infant weaning histories at Roman period Kellis, Egypt using stable isotope analysis of dentition. Am J Phys Anthropol. 2007; 134(1):63-74. DOI: 10.1002/ajpa.20639. View

15.

McDade T . Life history theory and the immune system: steps toward a human ecological immunology. Am J Phys Anthropol. 2003; Suppl 37:100-25. DOI: 10.1002/ajpa.10398. View

16.

Okafoagu N, Oche O, Raji M, Onankpa B, Raji I . Factors influencing complementary and weaning practices among women in rural communities of Sokoto state, Nigeria. Pan Afr Med J. 2018; 28:254. PMC: 5989191. DOI: 10.11604/pamj.2017.28.254.10992. View

17.

Rodriguez-Palmero M, Koletzko B, Kunz C, Jensen R . Nutritional and biochemical properties of human milk: II. Lipids, micronutrients, and bioactive factors. Clin Perinatol. 1999; 26(2):335-59. View

18.

Dupras T, Schwarcz H, Fairgrieve S . Infant feeding and weaning practices in Roman Egypt. Am J Phys Anthropol. 2001; 115(3):204-12. DOI: 10.1002/ajpa.1075. View

19.

Fernandes R, Millard A, Brabec M, Nadeau M, Grootes P . Food reconstruction using isotopic transferred signals (FRUITS): a Bayesian model for diet reconstruction. PLoS One. 2014; 9(2):e87436. PMC: 3923756. DOI: 10.1371/journal.pone.0087436. View

20.

Gronau Q, Wagenmakers E . Limitations of Bayesian Leave-One-Out Cross-Validation for Model Selection. Comput Brain Behav. 2019; 2(1):1-11. PMC: 6400414. DOI: 10.1007/s42113-018-0011-7. View