https://en.m.wikipedia.org/wiki/Bad_Science_(Goldacre_book)


Interesting : over 10 years ago, it was highlighted that the benefits were not clear.

https://en.m.wikipedia.org/wiki/Bad_Science_(Goldacre_book)

I've recently considered Tim Spector's example of Vitamin B12 as an experiment to conduct, and being in the UK, Vitamin D is possibly a wise precaution.