Isotope Analysis in Archaeological Contexts

Stable isotope analysis has become a cornerstone of archaeological science, offering direct insights into past diets, mobility and environmental interactions. By measuring the ratios of heavy to light isotopes—most commonly carbon (13C/12C), nitrogen (15N/14N), oxygen (18O/16O) and strontium (87Sr/86Sr)—in human and faunal remains, as well as in botanical and ceramic residues, researchers can reconstruct ancient food webs, track long-distance migrations and elucidate water-management and agricultural practices. Advancements in biomolecular and compound-specific approaches have enhanced the specificity of dietary and geographic signatures, while improvements in sampling strategies—from bone collagen and dental calculus to bioapatite and organic residues in pottery—have refined chronological and spatial resolution. These developments underpin global studies of trade networks, social stratification and responses to climatic and nutritional stress, forging stronger links between chemical proxies and broader anthropological narratives.

Research from Nature Portfolio

Recent studies have applied high-resolution molecular and isotopic techniques to long-standing archaeological questions. Analyses of organic residues from embalming workshops have employed gas chromatography–mass spectrometry to identify coniferous oils, tars and exotic resins, revealing sophisticated Egyptian mortuary practices and the extent of Mediterranean and tropical trade networks in the first millennium BCE. In parallel, sequential thermal desorption and pyrolysis-GCMS of human dental calculus has provided direct evidence for widespread consumption of seaweed and freshwater plants from the Mesolithic through to the Early Middle Ages in Europe, overturning assumptions that aquatic resources became marginal with the advent of farming. Together, these approaches underscore the capacity of biomolecular markers and stable isotopes to chart both ceremonial and subsistence behaviours at unprecedented detail.

Isotope Analysis in Archaeological Contexts publication trend

The graph below shows the total number of articles in isotope analysis in archaeological contexts across all publications each year (not limited to Nature Index journals).

Technical terms

Stable isotope: A non-radioactive variant of an element differing in neutron number, used to trace biochemical and environmental processes.

δ value: The per mille (‰) deviation of an isotope ratio in a sample relative to an international standard, indicating isotopic enrichment or depletion.

Isoscape: A spatially explicit prediction surface of isotope ratios in the environment, employed to infer geographical provenance.

Biomarker: A molecular indicator, such as a specific protein or lipid, that reveals biological or dietary sources in archaeological materials.

Dental calculus: Mineralised dental plaque that entraps dietary and microbial residues, serving as a reservoir of biomolecular information.

Collagen: A structural protein in bone and dentine whose carbon and nitrogen isotope composition reflects long-term dietary inputs.

References

1. Biomolecular analyses enable new insights into ancient Egyptian embalming. Nature (2023).
2. Human consumption of seaweed and freshwater aquatic plants in ancient Europe. Nature Communications (2023).
3. Complexities of nitrogen isotope biogeochemistry in plant-soil systems: implications for the study of ancient agricultural and animal management practices. Frontiers in Plant Science (2014).
4. Food Reconstruction Using Isotopic Transferred Signals (FRUITS): A Bayesian Model for Diet Reconstruction. PLOS ONE (2014).
5. A bioavailable strontium isoscape for Western Europe: A machine learning approach. PLOS ONE (2018).