Another area seems to be Africa. If anywhere was going to be hammered hard you think it would be there. I don’t think it has been, but I confess I could be wrong. Not too many obese Africans, except for the odd dictator or two
I’ve written about that very point elsewhere. But publicly scientists seem disinterested in the facts behind the dichotomy of western industrialized nations vs. 3rd-world.
It could very well be a facet of its ‘lab engineered’ origins - both for the dichotomy and for the seeming resistance to learn “Why?” - but my curiosity on this topic seems rather rare. Absent working in a laboratory, details to investigate those questions are quite sparse.