Weight loss by UV or Vitamin D
Wall Street Journal Blog wondered why Colorado was the only US state to have population with less than 20% obesity rate
http://blogs.wsj.com/health/2010/08/03/does-thinner-air-make-coloradans-well-thinner/

For more obesity information in Vitamin D Life
Obesity Influence Diagram is very complex.
By no means are vitamin D and UV the only causes
Hint: click on left arrow in upper portion of the screen to increase viewing width
Here is the link http://www.shiftn.com/obesity/Full-Map.html
