I just discovered Huberman earlier this year and I'm loving it! I mentioned in the post that I think I'm sleeping with my mouth closed, but now I'm thinking I need to get some medical tape to make sure.
I hear ya regarding the meditation, I don't meditate as much as I should (I try and get 10 minutes a day in), but I've noticed how it has made me more aware of breathing and posture.
I haven't heard of Dr. Berg, I'll check him out, thanks for the tip!
Cg
RE: Breathing In And Out - A Diary Of A Mouth Breather