It's funny how I look back and realize how instinctual I was as a child. For one, I think I subconsciously knew that dairy products were bad for you no matter how many times I was told I wasn't gonna grow if I didn't drink it. My mother could not get me to drink milk- ever. Guess what? I needed up growing taller than my entire family and my bones are pretty strong and healthy. ;)
I also practiced eating mono-meals even though I wasn't quite as aware of the benefits of it at the time. I would have meals of thirty oranges some days.