Quercitin + Bromelain has also helped my nasal polyps. The biggest improvement has been my ability to breath at night through my nose which has really improved my sleep.

Copilot recommended these supplements. Due to a lack of studies relating directly to the effect of these supplements on nasal polyps, it inferred they might help based on the known action of the supplements and the theorised cause of polyps, so it could all be nonsense. That said, both those supplements are considered safe at the doses I take and it appears to help, so even if it is a placebo effect I'm happy.