Government dietary guidelines effects health education, and my public school health education had an impact on the decisions I made during some of my more formative years.
Took a long time to realize just how bad the food pyramid was.
Keep in mind that lactose intolerance isn't evenly distributed across the globe. People of Northern European extraction have the lowest rates, so the Standard American Diet overlooking or ignoring other extant USAian groups' dietary needs and constraints from consideration (however numerous they may be among the US' population) shouldn't be too startling.