It'd be strange for it not to be an ingredient. As far as I understand it's added directly to the wort prior to fermentation.
I've only done homebrew - but I can't see how a powder, moss or tablet can be removed again once it has mostly dissolved.
But when I used gelatin it set the yeast sediment into a jelly-like layer at the bottom of the fermentation vessel, so when I bottled I'm not sure there was really any in the finished product. The same may apply here.
I think the point of all of them is to encourage sedimentation, and thus they shouldn't be significantly present in the finished product