B vitamins may offer some protection against the impacts of air pollution, a small scale human trial suggests:
bbc.co.uk/news/science-envi...
"The study shows the very presence of environmental factors like air pollution seems to alter genes in the immune system at the epigenetic level - switching them on or off, and inhibiting our defences.
Researchers had already seen that nutrients could somehow stop this process in animal studies with the chemical Bisphenol A.
Now in this new human trial, an international team of scientists wanted to see if exposure to concentrations of PM2.5 could be mitigated by a daily B vitamin supplement containing 2.5mg of folic acid, 50mg of vitamin B6, and 1mg of vitamin B12."