HUMAN EVOLUTION • ISOTOPE SCIENCE • OCTOBER 21, 2026
Neanderthals, Meat, and a Chemical Mystery
Ancient bones point to an unusually high position in the food web. But translating that chemical signal into a precise prehistoric menu is not straightforward.
What scientists measured
Stable nitrogen isotopes preserved in bone collagen offer clues about dietary protein. Nitrogen-15 generally becomes enriched as nutrients move through food webs, making isotope ratios useful for reconstructing trophic levels. Neanderthal collagen often shows elevated nitrogen-15 values consistent with substantial consumption of animal foods.
Why the numbers raise questions
An isotope value is not a direct measurement of how many pounds of meat someone ate. Local environmental baselines, prey species, physiological processes, and the mix of dietary proteins all influence the signal. Human nutrition also requires sufficient energy from fat and/or carbohydrates: extremely high intakes of lean protein alone are not a plausible complete diet.
The larvae hypothesis
One proposed explanation is that Neanderthals consumed decomposing animal tissue and insect larvae with elevated nitrogen-15. The analysis described by Futura Sciences reports that larvae would need to account for implausibly large proportions of the diet in modeled scenarios. This challenges larvae as a complete explanation; it does not demonstrate that Neanderthals never ate insects or scavenged.
What about mammoths?
Large herbivores, including mammoths, may have had isotope signatures that contributed to high Neanderthal values. Prey selection, regional ecological conditions and variation across Neanderthal populations are plausible parts of the explanation. No single hypothesis has been shown to explain every specimen.
What we know—and what remains open
Supported: nitrogen isotope evidence indicates high trophic-level dietary protein in many sampled Neanderthals. Not established: an exclusively meat-based diet, a universal Neanderthal menu, or a precise quantity of meat consumed. Other archaeological evidence and additional isotope systems are needed to test competing interpretations.
Source and further reading
Futura Sciences, “Neanderthals devoured tons of meat—but experts say something doesn’t add up” (October 21, 2026). This MKP article is an independent explanatory summary, not a claim that the original study has been independently replicated. The underlying research paper should be checked before treating specific modeled percentages as settled findings.