I used to have nasal polyps in most of my sinus cavities. Before surgery they were starting to move out of my nose. I had no sense of taste or smell and couldn’t breath through my nose. I went on the Atkins diet back when it was popular and after 2 wks my polyps had shrunk considerably and I smelled my body spray for the first time. Since then I’ve fasted often and noticed improvement in my sinuses.
With all that said, it’s not the fasting it’s cutting out inflammation inducing foods. Even after 3 sinus surgeries if I cut sugar, bread, grains, wheat, etc I have the same improvements in my sinuses that I do when I’m fasting.