On: Vitamin D reduces incidence and duration of colds in those with low levels

[Etheryte]

Maybe this comes across snide, but have you been to the Nordics? I can get tested at my GP for free practically as often as I'd like, I doubt you'd sell too much in the way of home test kits.

[theshrike79 → Etheryte]

Been living here my whole life.

I've been offered a (free) Vitamin D checkup exactly zero times. We should be getting them though, dunno why we don't.