Ancient teeth and DNA analyses indicate that patterns of insect consumption among human populations stretch back roughly 9,000 years. The new synthesis of dental evidence and ancient genomes suggests that eating insects was not uniform across prehistoric communities: in some regions it appears to have been an occasional dietary supplement, while in others it may have been a more regular component of the diet. These findings refine our picture of past foodways by linking direct physical traces with inherited genetic traits.
Microscopic residues preserved on teeth and genomic data recovered from ancient remains were used to identify markers of insect consumption and metabolic capacity. Populations living across northern Eurasia show relatively few dental or genetic signals consistent with routine entomophagy, implying insects were eaten sporadically. By contrast, evidence from other geographic zones points to more frequent consumption, reflecting a range of subsistence strategies shaped by local environments and resource availability.
Notably, analysis of ancient human DNA reveals that groups inhabiting or near the tropics tended to retain genetic variants that facilitate processing components of insect exoskeletons. At the same time, traces in the archaeological record associated with Neanderthals indicate that they may have included insects in their diets more often than some early modern human populations. Together, these biological and material lines of evidence point to a complex relationship between cultural choices and physiological adaptation across different communities and ecologies.
Beyond reconstructing past diets, the research has broader implications for understanding human dietary flexibility and how cultural practices interact with genetic inheritance. The geographic variability documented by the analyses highlights that food preferences and tolerances evolved in response to local conditions rather than following a single trajectory. At the same time, uneven preservation of teeth and DNA, and the uneven geographic coverage of available samples, mean that conclusions remain contingent on expanding the dataset. Continued integration of biomolecular and archaeological methods will be essential to map more precisely how insect consumption fit into the lifeways of ancient populations.
