I am not surprised to find out that our modern diet is rotting our teeth. Our diet now compared to back then has changed drastically. A lot of our foods now have been modified & have tons of unknown ingredients. The stuff we consume is heavily processed and modified and cannot be good for our oral health. Back when we used to be hunter-gathers, people never brushed their teeth or had good oral hygiene The foods that they ate were not modified and processed. I believe there needs to be more research into the types of things that are put into our food and how it affects our oral health.
A study of the evolution of our teeth over the last 7,500 years shows that humans today have less diverse oral bacteria than historic populations, which scientists believe have contributed to chronic oral diseases in post-industrial lifestyles.
The researchers, from the University of Adelaide's Australian Centre for Ancient DNA (ACAD), the University of Aberdeen (Dept of Archeology), Scotland, and the Wellcome Trust Sanger Institute, Cambridge, England, published their study in Nature Genetics.
The authors say that analyzing the DNA of calcified bacteria on the teeth of humans throughout modern and ancient history "has shed light on the health consequences of the evolving diet and behavior from the Stone Age to modern day".
The scientists explained that there were negative changes in oral bacteria as our diets altered when we moved from being hunter-gatherers to farmers. Further changes were observed when humans started manufacturing food during the Industrial Revolution....
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