Earliest Evidence For Caries And Exploitation Of Starchy Plant Foods In Pleistocene Hunter Gatherers From Morocco

This groundbreaking archaeological study examined the teeth of ancient hunter-gatherers who lived in Morocco between 15,000-13,700 years ago, discovering something unexpected: these people had exceptionally high rates of tooth decay (cavities in over 51% of their teeth), comparable to what we see in modern populations eating diets high in refined sugars and processed foods.

The researchers found evidence that these ancient people systematically harvested and ate large amounts of starchy wild plants, particularly acorns and pine nuts. This challenges the common belief that high rates of tooth decay only began when humans started farming and eating more carbohydrate-rich foods. Instead, it shows that even "natural" plant foods, when consumed in large quantities, can promote the growth of cavity-causing bacteria in the mouth.

This finding is particularly relevant for understanding how different foods affect our oral and metabolic health. While acorns and pine nuts are often considered healthy, whole foods, this study demonstrates that any diet high in fermentable carbohydrates - even from natural sources - can significantly impact our oral microbiome and dental health. The oral bacteria that cause cavities (like Streptococcus mutans) thrive on these carbohydrates regardless of whether they come from ancient acorns or modern candy.

For modern health optimization, this research reinforces the importance of considering not just food quality but also food quantity and frequency when it comes to carbohydrate consumption. It suggests that our clinical approach should focus on managing overall carbohydrate load and supporting healthy oral microbiome balance, even when patients are eating nutrient-dense, natural foods.