presumably is what you allude to?
Not true? It becomes fat if you are above your caloric intake.
Fiber on the other is just undigestible, so you always expel it, though I agree that too much fiber will cause issues.
Uh what? No. LOL.
I eat crazy amounts of protein, it's almost all of my diet outside of fibre and I've lost 120 pounds and now sit in the bottom of my BMI bracket.