A client reported feeling healthier after practicing mouth-taping at night to ensure nasal-breathing during sleep, which produces nitric oxide. I learned this technique in a Buteyko breathing workshop years ago with Robert Litman. Read more about mouth-taping in a post by functional dentist Mark Burhenne. “If you’re breathing through your mouth while you sleep at night, it’s a big deal.” Regular scotch tape is fine in case you do not have specialized tape.