The truth is that tooth decay is a relatively new phenomenon. Until the rise of agriculture roughly 10,000 years ago, THERE WAS NO TOOTH DECAY IN HUMANS. Let that sink in for a moment. Humanity is 2,500,000 years old. For the first 2,490,000 years no one ever had a cavity. If we understand that tooth decay started when people started farming instead of hunting and gathering for a living clearly you realize that tooth decay is a disease or mismatch between what you are eating and what your body expects you to eat. If we examine the past as prologue it becomes clear that the path to proper health starts in the mouth and the answers are so simple that not only did a Cave Man do it. They perfected it.
—John Sorrentino in a blog post August 6, 2012
Diabetic Mediterranean Diet 
I recently went to the dentist and he said I had some of the best and healthiest looking teeth he has seen in a while. He thought it was because I brush twice a day…pretty sure a big part of it is due to my no sugar, limited processed foods diet.
hi dr parker….but by the same reasoning, why would our digestion, and our appetite, have allowed us to begin using grains and sugars seemingly instantly and efficiently? it appears we evolved to accept a wide ranging diet but skewed toward paleo maybe? i can understand an ability to tolerate grains and sugars as a fall back solution in times of scarcity and starvation, under your scenario, but we seem to find them highly palatable and worth seeking out…addictive in fact. they have become our first choice not a fall back. wouldnt our systems dampen our taste for sugar and grains if evolution really intended a primary hunter-gather diet and tried to circumvent the damage grains and sugars appear to cause? im a low carber due to t2 diabetes so i am not pushing a political agenda, just intellectually cuious. i wonder if this is a problem of scale and the industrial revolution and agrarian mechanization? people in the 1700s and 1800s could not eat the amounts of sugars and grains we can due to inability to produce them in the volume we do now. and they didnt live as long as we do therefore they had less time on earth to GET cavities and lose their teeth. what about generally poor nutrition and its role in tooth decay? sugars and grains also must have been very expensive…no cheap Twinkies on the shelves! this is complicated and i think economics, history and food production techniques have to be evaluated…your thoughts?