What Our Ancient Teeth Reveal About Europe’s Appetite for Insects

When scientists dust off a fragment of ancient dental plaque—yes, the hard‑white stuff we call tartar—they’re actually pulling a time capsule from someone’s mouth. Inside that plaque you can find microscopic bits of food, pollen, and even tiny bits of fungus. It’s like a fossilized snack bar, and it can tell us a lot about what our ancestors were chewing on.

In a recent study, researchers examined dental calculus from a wide sweep of European sites, ranging from the Upper Paleolithic camps of France to Neolithic settlements in the Balkans. The goal? To see whether bugs ever made it onto the prehistoric menu. After grinding up the calculus, they used DNA sequencing to hunt for traces of arthropod DNA—basically, the genetic fingerprints of insects.

What they found was a little anticlimactic for anyone hoping to discover that ancient Europeans were fearless insect eaters. Out of dozens of individuals, only a handful showed any hint of insect DNA, and even those signals were faint—likely contamination or accidental ingestion rather than a regular dietary habit.

Contrast that with studies from Africa, Asia, and parts of Oceania, where insect DNA shows up far more often in ancient dental calculus. There, the archaeological record lines up with ethnographic evidence: insects have been an important protein source for millennia.

Why the difference? The authors of the study suggest a couple of possibilities. First, cultural preferences. Europe’s climate and fertile soils meant that farming and hunting large game were more reliable ways to get calories, so there was simply less need to turn to insects. Second, and more biologically interesting, is the idea that Europeans may have been less physiologically equipped to break down chitin, the tough outer shell of insects.

Chitin digestion isn’t automatic; it requires specific enzymes, like chitinases, which many mammals produce in modest amounts. Some populations, particularly those with a long history of entomophagy, have higher chitinase activity, perhaps because of genetic adaptation or gut microbiome shifts over generations. The dental calculus data hints that ancient Europeans didn’t develop that same enzymatic edge.

It’s worth noting, however, that the absence of insect DNA doesn’t prove they never ate bugs. Occasional consumption—say, a few beetles caught during a hard winter—might not leave a detectable signature. Still, the overall pattern is clear: insects were not a staple for most prehistoric Europeans.

This finding adds a fresh brushstroke to the picture of ancient European life, emphasizing how diet is shaped not just by what’s available, but by cultural choices and even subtle biological constraints. So the next time you think about “eating like a caveman,” remember that the European version probably involved far more meat, grains, and berries, and far fewer crunchy critters.