No link. Texags has gone into it more than once.
Reville (DR) recommends not to be deficient but dont do a hammer.
If you search around you can find the studies. It is controversial. You will see studies come down on both sides of the issue
Since I witnessed it first hand I err on the side of caution. Just like with Elderberry
USA
Total cases: 641,299
New cases: +27,413
Total deaths: 28,383
Today: +2,336