Vitamin D Calculator

http://nadir.nilu.no/~olaeng/fastrt/VitD-ez_quartMED.html

Coolest Link Ever! Simply type in your information and it will output the number of hours:minuites you need outside, to achieve necessary Vitamin D, without using supplements.

Why sunshine for vitamin D rather than a pill? Do some research for yourself :)

Start here 

http://www.sunshinevitamin.org/