This is very context dependent. If you grow up surrounded by a typical western/industrial/post-industrial diet, then yes, it almost certainly does.
But you could also change the food environment.
Hopefully the analogy/metaphor that connects this to schooling is reasonably obvious.
You go do that then. Enjoy your slow death from malaria.
The food choices having nothing to do with the jungle, but rather: regular, significant consumption of highly processed and most significantly sweetened foods. There were plenty of people in the world before the widespread adoption of sugar as cooking ingredient whose dental health would likely not have been improved by brushing, and they didn't live in "the jungle" but places like ... America, and Japan, and India and ... basically the entire planet.