I don't think we know 100% how much specific diseases contribute, but there is at least ongoing research about that, and it seems there is general changes in bo

I don't think we know 100% how much specific diseases contribute, but there is at least ongoing research about that, and it seems there is general changes in body odour composition: https://en.wikipedia.org/wiki/Old_person_smell https://en.wikipedia.org/wiki/Old_person_smell