I consider Wikipedia a good source for conversational information, and to that effect: http://commons.wikimedia.org/wiki/File:World_map_of_lactose_intolerance.p

I consider Wikipedia a good source for conversational information, and to that effect: http://commons.wikimedia.org/wiki/File:World_map_of_lactose_intolerance.png http://commons.wikimedia.org/wiki/File:World_map_of_lactose_... Actually, a little more looking, I think I also found the Yale study it's from. Here's the power point: http://cst.yale.edu/sites/default/files/worldwide http://cst.yale.edu/sites/default/files/worldwide distribution of lactose intolerance, madison 2010.pptx