If you pay attention to how a kid breathes, it is through their nose and deep into their belly. As we get older and carry more stress, we tend to breathe into our upper chest, which produces more stressful feelings. Taking time to breathe properly is important for sure. I've heard mouthwash kills good and bad bacteria. It's probably better to just use water.I told my dentist I stopped using mouthwash for nitric oxide production issues.
He said mouthwash is useless and it does more harm than good killing the good bacteria.
He said the most important thing for nitric oxide production is breathing through the nose.
This info is new to me but I will follow it.