I know the body can only digest sooooo much of ANYTHING at a time... but you have to keep things in perspective...
If you are training like a muther... your body will be able to digest alot more protein than 50grams... I mean, you hear stories about guys that eat 600grams/protein... and they eat 6 times a day... now... that's 100grams a sitting... they grow and appear to use it all...
Now, I'm no scientist, although I do quote science... but through my common sense, I'm guessing that if you body needed it, the value would increase...
However, I feel that there is, at some point, too much... of course.
C-ditty