We have been unundated by stories in the media about Volkswagen group vehicles releasing more nitrogen oxides in the real world than in tests. We have also seen many stories about rising Nox levels in our cities. And the third element, we have often read that nitous oxide, often used as an anaesthetic, depletes B12 levels.
The obvious question that comes from the above: Do nitrogen oxide pollutants affect human B12 levels?
I am not finding any useful research - but maybe I am just missing it all!