SpiderKing: Height variations are normal; I know plenty of guys who are much taller than their dads. The average height of a boy is the mean height of his parents plus two inches. So if your dad is, for example, 5'9" and your mom is 5'7", their mean would be 5'8", and the average height of their sons would be 5'10" (one inch taller than the Dad, in this example). An inch or two variation around this (say, 5'11" or 5'9" or even 5'8") can easily happen. Plus, as you said, better nutrition factors into it.
I wouldn't be suspicious unless you were significantly taller than what would be reasonable.
I wouldn't be suspicious unless you were significantly taller than what would be reasonable.