I used to guage my protein intake by my farts. the worse they were, then I knew I was using too much protein. No farts at all and I couldn't be sure that I wasn't needing more.
to better digest/absorb it, try ginger root - that supposedly helps and I think I recall the caps being cheap.
pineapple helps break things down, but I don't know how much it helps in terms of absorbing.