I was hoping for a little insight on vitamin D synthesis.
I live in a northern lat., 59 degrees or so. And was wondering how much exposure to the sun I would need in order to produce a healthy amount of vitamin D. Most importantly in the winter months
I have been told that there is not sufficient sun to produce any at all this time of year. Is that correct? What is it in the sun that helps us make vitamin D? UV? Is there a graph or chart to see the relative amount of vitamin producing rays month to month. I do understand that there are other factors potentially blocking Vitamin D producing rays. Elevation, smog, cloud cover? Assume that in my town we generally have snow on the ground, little or no air pollution, and live close to sea level.