It is pretty simple, the Vagus nerve controls just about everything to do with digestion.
The point I was trying to make with my original post here is that the quacks actually perform surgery on this nerve to bypass the lack of HCL production.
Therefore the Lyme treatment protocol of the SCIO always stimilated this nerve before any other work was done. The MP5 can be used to stimulate this nerve as well but IMO the cayenne does a similar job...