system
Given the following post, respond as if you're commenting on Reddit:
human
How much of height is determined by genetics? 

My brothers and I are all ~6'4", my mom is 5'8" and my dad 6'2", and I was wondering if it was purely genetics or if some outside factors could have had a say in the matter. For instance, when we were growing up we'd go through about 8L of milk a week and we spent the majority of our childhoods swimming. Could this have had a say in our height?
gpt
Your maximum potential is based solely on your genes. However, in order to reach that height you need adequate nutrition. Anyone eating enough calories to grow and not suffering from malnutrition will grow to their maximum height as dictated by their genes.