Get Enough Vitamin D From Sunlight Using This App
by Beth Skwarecki on Vitals, shared by Beth Skwarecki from Lifehacker on (#3S7RZ)

Our skin can turn 7-dehydrocholesterol into vitamin D with just a little help from sunshine. If you don't get much sun, no biggie, you can also get vitamin D from your food. But you may be wondering-how much sunshine is enough?