You get some cucumber, some spinach, some kale, and then, if you want, you can add a little of beet in there, which has a lot of natural uh — Nitric oxide, NO2, which is a good nasal dilator.
An external nasal dilator, the Breathe RightR brand nasal strip, enhances nasal breathing by attaching to the outside of the nose like a bandage, and gently lifting and opening the nasal passages.