Vitamin D from the sun 3 to 12 months of the year in the US
UV Index must be greater than 3 ( above the green) to generate any vitamin D
People in Anchorage: vitamin D for 3 months of the year
People in Minnesota: vitamin D for 6 months of the year
People in Florida: vitamin D for 12 months of the year
CLICK HERE for other US UV index
You only get enough vitamin D with 10 minutes in the sun noontime in Florida from April thru Sept
How Much D includes equations
National and Experts Recommendations of How Much vitamin D you should have
CLICK HERE for VitaminDWiki Home Page for Overviews and lots more details
Introduction to Vitamin D page 6 If shadow TALLER than you are tall, you CANNOT make vitamin D, also UV Index 3
UV Index guide by US Weather Bureau - 2010 6 pages with lots of graphics
UV: The original Source! How to use it April 2010 58 slides, 2 of which are in this File Gallery. Video is on web at http://www.grassrootshealth.net/ and YouTube
Increased UVB intensity did not increase vitamin D generated – Nov 2010
Ways to increase the amount of vitamin D you get from the sun
Map of minutes of sun to get 106 joules in July single image
- from: UV in North America with many maps 2010
