I say it's a combination of all of the processed sugars and hybrid carbohydrate plant life and all of the other other stimulants drugs including caffeine and alcohol and nicotine and artificial sweeteners and high fructose corn syrup and milk and doctor's prescribed medicines.
Every one of them man made poisons..
In nature we consume none of this..
We lived to be over a hundred years old and lived in perfect health the whole way and with zero infant mortality and early childhood death..
The exact opposite of what we have been taught..
Perfect people on a perfect land the world over.
Just like all of the other species.