I also recommend that one. It made me always try to keep my mouth closed when i'm not eating or talking. Not sure though if it had impact on my health, but that

I also recommend that one. It made me always try to keep my mouth closed when i'm not eating or talking. Not sure though if it had impact on my health, but that of course might depend on where you come from. Other Books following the direction: https://whatto.space/self-help/nestor_james_breath/ https://whatto.space/self-help/nestor_james_breath/