Our bodies make Vitamin D in response to natural sunlight exposure. It is the best way to get Vitamin D- it's harder to get enough from any food sources but mushrooms and fortified foods do have some. Vitamin D is fat soluble so we can store it ,so we don't need it every day like water soluble vitamins such as C. The recommendation is about 15 to 20 minutes of exposure to sunlight without sunscreen a day. I'm thinkin' this is one of the reasons why macrobiotics recommends a daily outdoor walk? I have read that Vitamin D is extremely important for reducing cancer risk.
Me neither- no excuse. But do I get 15 minutes a day without sunscreen in the winter? Not a chance! I run from car to bulding only when I must leave the house. It's no good. I gotta get out there and walk!