> Actually, people who ate real food 150 years ago had teeth that were massively worn down. I recall reading that cavefolk apparently had great teeth before ag

> Actually, people who ate real food 150 years ago had teeth that were massively worn down. I recall reading that cavefolk apparently had great teeth before agriculture was invented... stone-milling grains such as wheat into flour also introduces stone particles into it, and eating breads and other foods that include the flour will gradually degrade your teeth. Modern steel-milled flours do not have this issue, but apparently the heat generated from the friction partially cooks the grain and reduces the nutritional content.