Neanderthals did not rely on fly larvae as a major food source, according to a 2026 analysis published in the American Journal of Biological Anthropology. Using mathematical models, researchers found that larvae would need to make up more than 40% of Neanderthal protein intake—sometimes exceeding 100%—to explain the chemical signatures in their bones. This impossibility suggests Neanderthals were primarily skilled hunters of large animals, not scavengers of insects.
Scientists have long wondered what Neanderthals ate by studying the chemical makeup of their bones. A recent study challenges the idea that Neanderthals got much of their protein from eating fly larvae found on dead animals. Using mathematical models and chemical analysis, researchers found that larvae alone couldn’t explain the nitrogen levels found in Neanderthal bones. Instead, the evidence points more strongly to Neanderthals being skilled hunters who ate large meat-eating animals. This research helps us understand how these ancient humans survived and what made them successful hunters.
Key Statistics
A 2026 research article in the American Journal of Biological Anthropology found that fly larvae would need to supply more than 40% of total dietary protein in most scenarios to account for nitrogen levels in Neanderthal bones, and in many cases would exceed 100% of protein intake.
According to Gram Research analysis of isotopic data, the mathematical gap between herbivore baseline nitrogen levels (4‰ to 8‰) and Neanderthal collagen nitrogen levels (14‰) cannot be explained by larval consumption alone, requiring a +6‰ to +10‰ isotopic span.
The 2026 study tested sensitivity across multiple scenarios involving herbivore baselines, larval nitrogen values, and trophic enrichment factors, and found that no plausible variation in these factors could make the larval hypothesis work.
The Quick Take
- What they studied: Whether Neanderthals ate significant amounts of fly larvae from dead animals, which some scientists thought might explain unusual chemical markers in their bones.
- Who participated: This wasn’t a study with human participants. Instead, scientists analyzed chemical data from Neanderthal bone samples and compared them to information about animals that lived during the same time period.
- Key finding: Fly larvae could not have been a major food source for Neanderthals. The math shows that larvae would need to make up more than 40% of their protein intake—and sometimes over 100%—which is impossible. This means something else explains the chemical markers in their bones.
- What it means for you: This research helps us understand human history better. It shows that Neanderthals were likely successful hunters who ate meat from large animals, not scavengers relying on insects. While this doesn’t directly affect modern life, it changes how scientists think about our ancient cousins’ abilities and survival strategies.
The Research Details
Scientists used a special mathematical tool called an isotopic mixing model to test whether eating fly larvae could explain the chemical signatures found in Neanderthal bones. They started with measurements of nitrogen levels in Neanderthal collagen (a protein in bones) and compared these to nitrogen levels in animals that lived at the same time. They also included published measurements of nitrogen in fly larvae.
The researchers then ran multiple scenarios through their mathematical model, changing different assumptions each time to see if the results would change. They tested what would happen if the baseline nitrogen levels in ancient herbivores were different, if fly larvae had different nitrogen levels, or if the way nitrogen moves through the food chain worked differently than expected.
This approach is like solving a puzzle: if you know the final answer (the nitrogen level in Neanderthal bones) and you know some of the pieces (nitrogen in animals and insects), you can calculate how much of each piece would be needed to create that final answer.
This research method is important because it lets scientists test ideas about ancient diets without needing to find actual food remains, which rarely survive thousands of years. By using chemistry and math instead of guesswork, researchers can determine whether a proposed food source could realistically have been important to ancient humans. This approach is more reliable than just saying ‘maybe they ate this’ without checking if the numbers actually work out.
The study’s strength comes from its mathematical rigor and sensitivity testing. The researchers didn’t just run one calculation—they tested many different scenarios to make sure their conclusion was solid. The fact that the results stayed the same even when they changed their assumptions suggests the findings are reliable. However, the study relies on published data about fly larvae nitrogen levels and ancient animal baselines, so the quality depends partly on how accurate those previous studies were. The researchers were transparent about testing multiple scenarios, which is a sign of good scientific practice.
What the Results Show
The main finding is striking: fly larvae simply cannot account for the high nitrogen levels seen in Neanderthal bones. According to Gram Research analysis, the mathematical model shows that larvae would need to provide more than 40% of total dietary protein in most scenarios, and in many cases would need to exceed 100%—which is physically impossible since you can’t eat more than 100% of your diet from one source.
The researchers tested this across many different assumptions about what the baseline nitrogen levels were in ancient animals and what the nitrogen levels were in fly larvae. No matter how they adjusted these numbers within reasonable ranges, the same problem appeared: larvae alone cannot explain the chemical signature in Neanderthal bones.
This means that if Neanderthals did eat fly larvae at all, it was only a small part of their diet and wouldn’t have significantly affected the chemical markers scientists see in their bones. The high nitrogen levels must come from something else—most likely from eating meat from large carnivorous animals.
The research also provides insight into how environmental factors might have affected the chemical signatures in ancient bones. The study notes that variation in the local environment and which animals lived in different areas could have influenced the baseline nitrogen levels. This suggests that Neanderthals living in different regions might have had somewhat different chemical signatures in their bones, not because they ate differently, but because the animals around them had different baseline chemistry.
Previous research had proposed that Neanderthals might have eaten fly larvae as a protein source, partly because scientists were trying to explain why Neanderthal bones had higher nitrogen levels than the herbivores they hunted. This new study doesn’t reject the idea that Neanderthals might have occasionally eaten larvae—it just shows that larvae couldn’t have been a major food source. The findings support earlier ideas that Neanderthals were primarily carnivores who hunted large animals, which fits with other archaeological evidence showing stone tools designed for hunting and butchering.
The study relies on published data about nitrogen levels in fly larvae, and there may not be much data available about the specific types of flies that would have lived during the Neanderthal era. The researchers also had to make assumptions about how nitrogen moves through the food chain (called trophic enrichment factors), and these assumptions could vary slightly. Additionally, the study doesn’t have direct measurements from actual Neanderthal food remains, so it’s working backwards from bone chemistry rather than having direct evidence. Finally, the study focuses on nitrogen isotopes and doesn’t consider other chemical markers that might tell us about Neanderthal diet.
The Bottom Line
Based on this research, scientists should focus their investigations on Neanderthal hunting and carnivory rather than on insect consumption as a major dietary component. For researchers studying ancient human diets, this demonstrates the importance of using mathematical models to test whether proposed food sources are actually feasible. The confidence in this conclusion is high because the mathematical results were consistent across many different scenarios.
This research matters most to paleoanthropologists (scientists who study ancient humans), archaeologists, and evolutionary biologists who are trying to understand how Neanderthals lived and survived. It’s also relevant to anyone interested in human evolution and prehistory. The findings don’t have direct implications for modern nutrition or health, but they do help us appreciate how skilled Neanderthals were as hunters.
This is historical research, so there’s no timeline for ‘seeing benefits.’ However, this study may influence how future research is conducted and what questions scientists ask about ancient human diets. Over the next few years, we may see more studies using similar mathematical approaches to test other ideas about what ancient humans ate.
Frequently Asked Questions
Did Neanderthals eat insects as part of their diet?
While Neanderthals may have occasionally eaten insects, a 2026 study shows fly larvae could not have been a major food source. The chemical evidence in their bones points primarily to meat from large animals as their main protein source.
How do scientists figure out what ancient humans ate?
Scientists analyze chemicals called isotopes in ancient bones. Different foods leave different chemical signatures. By comparing Neanderthal bone chemistry to known animals and foods, researchers can work backwards to determine diet.
What does this research tell us about Neanderthal hunting abilities?
This study supports the idea that Neanderthals were skilled hunters who successfully hunted large animals. The chemical evidence in their bones shows they ate primarily meat from high-level carnivores, demonstrating sophisticated hunting strategies.
Could Neanderthals have eaten both meat and larvae?
Yes, Neanderthals likely ate some larvae occasionally, but the research shows larvae made up only a tiny, unimportant part of their diet. Their primary nutrition came from hunting and eating large animals.
Why is understanding Neanderthal diet important?
Studying ancient diets helps us understand how our evolutionary cousins survived and adapted to their environment. It reveals their intelligence, hunting skills, and social organization—showing they were sophisticated hunters, not simple scavengers.
Want to Apply This Research?
- While this research doesn’t directly apply to modern nutrition apps, users interested in evolutionary biology could track their learning about human prehistory by noting key discoveries they learn about and how scientific understanding changes over time.
- This research doesn’t suggest specific behavior changes for modern people. However, it could inspire users to learn more about human evolution and to appreciate the hunting and survival skills of our ancient ancestors.
- For those interested in paleoanthropology, consider following updates from major journals in this field and tracking how scientific understanding of ancient human diets evolves as new research emerges.
This article discusses archaeological and anthropological research about ancient Neanderthal diets. The findings are based on scientific analysis of bone chemistry and mathematical modeling, not direct observation. This research does not provide nutritional guidance for modern humans and should not be used to make dietary decisions. For questions about your own diet and nutrition, consult with a registered dietitian or healthcare provider. Archaeological interpretations can change as new evidence emerges.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.