Well, I was eating the sorta usual amount of herring and salmon for a Swede, and was still diagnosed with a severe lack of Vitamin D, a few years ago. I got a r

Well, I was eating the sorta usual amount of herring and salmon for a Swede, and was still diagnosed with a severe lack of Vitamin D, a few years ago. I got a recipe for 3200 IU/day based on my test.