It must be the diet and proably the general more stressy life style. Anytime I'm coming back from a business trip to the states, I feel bloated like a hot air baloon. Not sure what they put in their food. Generally, you get this fast food crap everywhere and it's almost impossible to have a normal (what a European would consider so) meal during lunch break. It even starts at their high schools with super unhealthy ham and cheese sandwhiches and what not. But it's not only that. Last time I bought some apples in a grocery store and holy shit, those apples tasted like some chemical bomb. They looked really nice though....