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God: I'll give them teeth ..... without any instructions on how to maintain them.
And put a whole bunch of fleshy bits right next to them, and even though they'll always be in the same relative positions you'll bite the fleshy bits just frequently enough to wonder why the teeth and fleshy bits are in such close proximity and how after X years of existence this is still happening.
We evolved in a world with little sugar, few starchy plants. 15,000 years ago everyone (except those where sugar cane grew) had excellent teeth
In the fossil record bad teeth come at the same time as bread, though it took sugar (especially in fizzy drinks) to make everyone fat and diabetic
I eat carnivore and haven't brushed my teeth in five years and have not had any tooth aches
The other white substance that you should watch for that our ancient ancestors never had to deal with is ....
SALT
Like too much sugar ... consuming a substance that was rare to our ancient ancestors is bad for your health ... you might have excellent teeth, but you might keel over with a heart attack or a stroke.
Much of the stuff about salt and heart health is bullshit. It's from a well publicized hypothesis that was never tested
Having said that we don't need much, I don't add salt to the beef which is more than 90% of my diet, I do add a small amount of salt to water after a heavy drinking session, it's good for rehydration, and I don't drink, especially heavily often
When I was on keto I took a lot of salt (which is why I looked up the current scientific position on it) and I can tell you it's pretty difficult to take too much, salt tastes terrible if you have had enough
The thing that increased heart disease: same as everything else, sugar. It prevents use of the circulating fat, which is carried in high density cholesterol. Fatty acids (fats) build up as you eat more fats but cannot burn them because carbohydrates must be burnt first
The HDL cholesterol exceeds its lifespan with nowhere to deliver the fat and breaks up, this increases free fatty acids (with no protective cholesterol cage) and small fragments of the HDL cage, those fragments are the ones that embed in the walls of blood vessels, collect calcium and eventually break off as a calcified clump and blocks something important