My parents were both upper class in Bangladesh (so a rich diet in fish, meat, etc.) and I'm 3" taller than my dad (moved to US at 5) and my brother is 5" taller

My parents were both upper class in Bangladesh (so a rich diet in fish, meat, etc.) and I'm 3" taller than my dad (moved to US at 5) and my brother is 5" taller (born in US).