1) It has D2, so it's almost useless.
2) Yeah, I was exaggerating, who fucking cares? I don't live there, I have no idea how cold it gets, accuracy wasn't the point. I said already whether it's -25° or +25°, no one goes outside half naked in winter, not even here in sunny Arizona. That's what's required for natural vitamin D manufacture in your skin.
3) OK. A few bathing suited minutes outside, one day in the middle winter, does not a sufficient winter-long supply of vitamin D make.
Finally, NOT A SINGLE ONE of your points is relevant to the thread. Go back and read the first post. I started this thread because the 3 hosts were talking about getting vitamin D in winter, and while they went off in various tangential directions, they all failed to mention that the natural mechanism for your body to produce it requires exposing a significant portion of your naked flesh to direct sunlight, which is largely unavailable in northern climates during the winter, for various reasons, only some of which they covered. I was annoyed that they failed to mention that most important point, especially because Ian acted like the sun just being out, whether he was exposed to it or not, was sufficient. It isn't.
Milk, supplements, sun lamps, none of them are actually relevant here. I wasn't talking about the alternatives. I was talking about the conversation they were having on that particular show, wherein they failed to recognize the natural mechanism which makes vitamin D in your body, and why most people get deficient in winter time.