[rmelhem]

just a personal note, I had many many respiratory tract problems - tonsillitis, flu, cold, at least 3 times a year. I always thought it was something natural, given the seasonality of these diseases, especially in winter. but after a routine blood test, my doctor prescribed vitamin D because mine was way below recommended. since 2017, when i started taking vitamin D supplementation, only a mild flu is what I had in 3 years, so to me that article is no surprise, of course in a personal experience level.

[ageitgey]

There were big studies in 2016/2017 that demonstrated the connection between Vitamin D and lowering the incidence of colds and other respiratory infections. This led to some governments (like the UK) recommending universal daily supplements for all citizens during the winter months.

See https://www.sciencedaily.com/releases/2017/02/170216110002.h...

[rmelhem]

cool, that's great. will check it, thanks!