How far can someone in their late teens (say 17, 18) who is starting from a base of around 125-135 (so pretty skinny) go NATTY

I keep seeing these transformation posts that look too good to be true, and then you find out that it just isn't natural.

I just want to know, realistically, can one starting from the position i described achieve a ripped type body, within say, 5, 10 years? Someone completely skinny, to someone ripped, NATTY.