I'm around 5'10", my father is the same height, my mother is around 5'7", sisters are in the 5'8 - 5'9" range. At 13, my brother is still growing, but from the looks of it, he will be quite tall... at least 6'1" probably. We are all very slender and visibly leaner than most people, I'm thinking this is firmly genetics taking the wheel here because all of our diets (both currently and growing up) varied a bit. Our heights are pretty normal for our ethnic group. I was a picky eater though because my limited food choices growing caused me frequent bowel troubles. I wonder had I consumed better quality food and less carbs, maybe my hips wouldn't be so narrow, my bones so oddly long, and my jaw wouldn't be as small (I had NO ROOM for wisdom teeth, so they were all extracted several years ago). My overall body shape/type is typical for women with my ethic heritage though, so I don't worry about that too much.
My husband is around 5'9", his brother is shorter than average, as is his mother. His father is about 5'11". There are a few people in his family that a quite a bit shorter than the average of their ethnic heritage, but I'm certain that this is genetics because the everybody else is notably tall on the same SAD.
Husband's family is of northern European mixed heritage (Nordic & Germanic), and my family all originates from a single town in West Africa. Will be interesting to see how our children turn out...I'm think the dice will roll on the very tall side regardless of diet. I am paleo, and husband currently isn't.
I dream of a world in which a chicken can cross the road without having its motive questioned.