I was smug for a while, but I kept reading and researching. Eventually I learned just how much I hadn't yet learned and the smug went away.
The one thing I 'know' (and even this might be wrong) is that no one actually knows anything about nutrition or how any of this works. It's all theory and guess work and trial and error. I think I've found what works for me, but I'm still tinkering and tweaking.
Okay. Maybe I'm still a little smug.