Earlier quoted context omitted.
The problem and solution has been known for almost a century now; check out the book 'Nutrition and Physical Degeneration' by Weston Price. 'The Dental Diet' is also solid reading. I'm still working through the book, but the tl;dr is that it mostly just comes down to nutritional deficiency. People in the past ate pretty much strictly nutrient-dense foods, people today eat a lot of junk food, empty carbs, and generall…
Can’t you make up for nutrition dense foods with supplements?
We're still discovering new plant molecules and the effects they have on us all the time. Supplements are never going to be able to completely make up for a diet lacking in real whole plant food & animal meat.
With respect to the question about underdeveloped jaws, that development takes place primarily during your childhood, so if you didn't have optimal nutrition at that stage you won't be able to fix that retroactively.