i honestly don't think you will have your mouthpiece in your mouth for long enough durations of time for it to matter.
right now, one would basically have to stop breathing to avoid toxins...and eating, and drinking anything.
i agree to try to avoid stuff if possible but, honestly, the mouthguard is not one I'm going to worry about.
which reminds me I lost mine and need a new one.
"George never did wake up. And, even all that talking didn't make death any easier...at least not for us. Maybe, in the end, all you can really hope for is that your last thought is a nice one...even if it's just about the taste of a nice cold beer."
"If you find the right balance between desperation and fear you can make people believe anything"
"Is enlightenment even possible? Or, did I drive by it like a missed exit?"
It's simpler than you think.
I could be completely wrong"