Yes I think this is a big factor - also the social barriers to eating this junk food is lower. It used to be you'd eat at home and seldom buy and eat anything w

Yes I think this is a big factor - also the social barriers to eating this junk food is lower. It used to be you'd eat at home and seldom buy and eat anything when out, social eating at a restaurant was a special occasion and you'd eat 'treat' foods like cake or ice cream. This sort of eating is now nearly every day, all it takes is 100-200 calories to much a day and you're a fatty in 10 years. I suppose a good example of this is to look at asians who have a traditional diet - they sit around as much as the westerners but are still predominantly thin, though you can tell who's adopted a western diet.