yeah i did say it would mess you up in the long run and as for nutrients i meant things like calories and stuff.
prions is by far the biggest problem, no one wants holes in your brain after all xD
but there are other things that can kill you or cripple you for life other than prions too.
things like blood born diseases and stuff are just a lot less common and usually not as problematic.
but they are still there if you get lucky and manage to avoid turning your brain into a sponge.
Bulletproof and armor-like hide and it gets spooked when shot with an arrow? Looks like the encyclopedia isn't up to date or MC's behemoth is really sensitive.