This is an interesting paragraph from an interview with the Alex Jamison, girlfriend of Morgan Spurlock from Supersize me and 30 days
" Take milk, or what she calls the "dairy dilemma". The US department of agriculture's recommendation of three servings of the white stuff a day (including yogurt and cheese) is "about twice what the World Health Organisation recommends. Why is that? Why are we all of a sudden needing so much more than everybody else on the planet? I don't understand that. And we have diseases here that involve protein and calcium that they don't have in rural China; they have very little dairy in their diet there, and they have no osteoporosis. Here we're told to drink milk for healthy bones but we have more osteoporosis than anybody. There is something happening here - we're not being told the whole story."
http://www.guardian.co.uk/weekend/story/0,3605,1678392,00.html?gusrc=rss