I was reading about the differences between mouth and nose breathing, and it seems that nitric oxide is beneficial to cardiovascular health, but that only breathing through one’s nose produces it. I couldn’t seem to find a simple explanation for it.
Edit to add: I thought this was a genuine question about something I didn’t understand but wanted to. So much(passive) aggression in the comments. Apologies. I was just trying to learn.
In: 2430
Nasal breathing is known to produce nitric oxide (NO) due to the presence of nitric oxide synthase enzymes that are located in the lining of the nasal passages. These enzymes convert the amino acid L-arginine into NO gas, which is then released into the nasal airways.
Breathing through the mouth, on the other hand, bypasses the nasal cavity and the nitric oxide synthase enzymes, which means that little or no nitric oxide (NO) is absorbed.
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