The organisms, whose expansion is enormously and very specifically stimulated by the amylopectin (Clostridial XIVA/Bifidobacteria) don't just participate in the chemical degradation of these alkaloids though, they very prominently maintain the intestinal integrity to keep these compounds, which I believe are not so readily absorbed in the GIT, from passing the epithelial barrier. Intestinal permeability increases toxicity in a variety of ways.
In fact, people who market zeolite brag that it can enter the bloodstream. (Although, they claim it needs to be <0.3µm, which seems to be incorrect according Volkheimer and other studies). In other words, if you consume any of these particles, the body seems to choose to let some of the particles past the GIT barrier.
This has often been hypothesized to be some kind of defect, but it may also be that this persorption allows, among other things, dirt and clays to go after toxins that make their way into the bloodstream.
In other words, it may be that one of the ways activated charcoal and medicinal clays (particularly zeolite) work so well is that they appear to have the ability enter the bloodstream and adsorb toxins. And the body has natural filters along the way to remove them (liver, lymph, kidneys). Therefore, eating dirt with a raw potato may allow the dirt to chase down and neutralize any glycoalkoloids that enter the bloodstream.
Perhaps most interestingly, humans and animals have been observed to crave geophagy (eating dirt) during times of GI distress. This implies that it might even be done during high levels of intestinal permeability.
I've also heard that persorbing a sampling of pollens into the bloodstream may also be a way for the body to expose itself to small doses, for immune purposes.