Maybe they just ate a lot more fat for calories?
Good question. Also food was more pure, so nutrition was more absorbable (maybe?).
I have questions too…like, it doesn’t make sense to me that the best way to raise metabolism is to eat foods that are not healthy (sugar? Refined flour? These inhibit and weaken the immune system in my experience). I wonder if there’s a way to raise metabolism/body temp and keep the immune system intact as well.
I know eating the calories from only healthy foods is possible…but may be out of my price range.