A hammer dose is 10K.
I’ve taken two 5Ks , for the 10K, for a couple of days, if I feel like I’m coming down with something.
There used to be a FReeper who posted about the wonders of Vit D, often.
I can’t recall who it was....but....he was/is right!!
Thx Jane, I woke up feeling fine. But I’ll keep those supplies on hand for the next time.