Reply #16: Who gave you that batshit gouge? They musta thought you were cute and wanted to see more of you!!

[MADem]

If you're fair skinned, experts say going outside for 10 minutes in the midday sun—in shorts and a tank top with no sunscreen—will give you enough radiation to produce about 10,000 international units of the vitamin. Dark-skinned individuals and the elderly also produce less vitamin D, and many folks don't get enough of the nutrient from dietary sources like fatty fish and fortified milk.

http://health.usnews.com/articles/health/living-well-usn/2008/06/23/time-in-the-sun-how-much-is-needed-for-vitamin-d.html

Your body makes vitamin D when you are exposed to the ultraviolet B (UVB) rays in sunlight. You probably need from 5 to 30 minutes of exposure to the skin on your face, arms, back or legs (without sunscreen) twice every week. ...The amount of exposure also depends on the time of the year. In the northern hemisphere, the UVB is more intense during the summer months and less intense during the winter months. In fact, if you live north of the 42-degrees latitude, you will have a difficult time getting enough vitamin D from the sun from November through February. If you live north of a line drawn on a map from the northern border of California to Boston, Massachusetts, you will probably need additional vitamin D from the foods you eat during the winter.

http://nutrition.about.com/od/askyournutritionist/f/sunlight.htm