Vitamin D?

I don’t know much about it, other than the fact that it is important. And that you can produce it if you are exposed to sunlight. And that you get less sunlight in the winter months.

If you are in the dark about vitamin D, check out this article on active.com. You might just learn something.

http://www.active.com/story.cfm?story_id=12604

And don’t forget your sunscreen! (Or maybe you should forget your sunscreen?)