Why does only nose breathing produce nitric oxide?

Question

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.

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Answer 1

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