Living in China opened my eyes to this (and many other things). While there, I was healthy, had incredible energy, looked and felt younger... When I came back, my health took a nosedive. In China, I ate whatever I wanted, at out, drank a lot ; here, I am Very careful to eat only "healthy" foods... and that's not enough. I'm aging like an American, hurting everywhere, I got hypertension, gaining weight. 

So here's something I learned about China - they refuse to import our GMO crops. Russia, too. China actually imports a lot of food, maybe most of it, but they absolutely refuse western GMO shit, and America hates them for it.