Mudbear

The way it was explained to me years ago when I got RH was that my immune system was attacking me and so is yours. The best thing was to suppress it or calm it down so it would stop doing that.
With GBS or CIDP or any Auto Immune problem, you want to calm your immune system down as much as is safe.
Boosting it will not do that and it could have a really bad effect of your body and make your symptoms worse.