The Medical News Today website published this wonderful article, or several articles, on phlegm, mucus, etc. of whatever color you are coughing up today.
https://www.medicalnewstoday.com/articles/318359?utm_source=Sailthru%20Email&utm_medium=Email&utm_campaign=MNT%20Daily%20News&utm_content=2023-10-13&apid=39277860&rvid=b5a662ba6d6c4919e094d536cc0a13d717aa0d88f68d24a520305005d73f5d2e
However, I don’t think it really tells My story. I seem to get phlegm from what I eat, not what I breathe. Something in my gut seems to send a signal to my lungs to make phlegm very shortly after I eat something (anything, not just something like dairy). As I have written before I get a lot of help from fisetin, probiotics, and this article really does not seem to talk about natural anti-inflammatories and antioxidants, only pharmaceuticals.