Reminds me of the studies showing that genetically Japanese are no shorter than Europeans. They simply eat less red meat while growing up and that reduces height.
https://www.bbc.com/news/health-23896855
“Men’s average height ‘up 11cm since 1870s’”
Abraham Lincoln was 6’4”, which by today’s standards is tall. By his day’s standards he was a giant. You can really tell when you see his pictures visiting the troops.