in that case the Americans should be much taller than Europeans
Americans' reaction to hormones foods is growing vertically rather than horizontally.
Oh by the way I said only the Dutch not all the Europeans.
Dutch 80.7%, EU 5%, Indonesian 2.4%, Turkish 2.2%, Surinamese 2%, Moroccan 2%, Caribbean 0.8%, other 4.8% (2008 est.)
http://www.indexmundi.com/netherlands/demographics_profile.html
white 79.96%, black 12.85%, Asian 4.43%, Amerindian and Alaska native 0.97%, native Hawaiian and other Pacific islander 0.18%, two or more races 1.61% (July 2007 estimate)
note: a separate listing for Hispanic is not included because the US Census Bureau considers Hispanic to mean persons of Spanish/Hispanic/Latino origin including those of Mexican, Cuban, Puerto Rican, Dominican Republic, Spanish, and Central or South American origin living in the US who may be of any race or ethnic group (white, black, Asian, etc.); about 15.1% of the total US population is Hispanic
http://www.indexmundi.com/united_states/demographics_profile.html
As you can see in the states they have more non European descent people who have shorter genes, the other ethnics also tend to suffer lactose intolerance more than European descendants ppl.
Moreover, the lower class in the states probably suffer malnutrition more too, since they are a capitalist society and none of the health care is funded by the government, it has to be paid from their own pocket.
Until Obama came along, and made the middle class pay for the lower class, my relatives over in the States are not happy with that, but that is another story unrelated to this...
So I took some time to read more into this subject:
According to this
https://www.theguardian.com/world/2015/apr/08/scientists-try-to-answer-why-dutch-people-are-so-tall
Natural selection in addition to good environmental conditions may help explain why the Dutch are so tall,” said the study published Wednesday in the Royal Society journal Proceedings B.
“Height is very heritable – taller parents tend to have somewhat taller children than shorter parents,” Stulp said. “Because taller individuals would have more offspring in the next generation who would be taller, the average height in that generation would a bit taller on average than the preceding generation, if all else is equal.”
There seems to be a cultural preference as well.
Stulp pointed to figures showing that, in the United States, shorter women and men of average height have the most reproductive success.
“There is much variation in what men and women want,” he said. “When it comes to choosing a mate, height tends to have (only) a small effect, which is not very surprising given the many other, more important, traits people value in their mate.”