Long-term exposure to fine particulate matter is unfortunately a by product of our urban environments and of course smoking. The study in a mouse model demonstrated that NMN supplementation exerted therapeutic efficacy against particulate matter induced lung injury in mice by regulating immune functions and lipid metabolism.
Nice to know that NMN may be helping in this area, but it does make sense as my own experience while on NMN is a super charged immune system, have not even had a sniffle, nothing in over 4 years now
The study is found here:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10351503/
