I've found a useful link that show the Sun's Altitude on any given day in any area of the world. All you have to do is fill in the info for your area and vola, you get a read out for the day. How cool is that? Check it out.
Tags: Altitude, D, Sun, Table, UVB, Vitamin, radiation
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march 18th from 11:40 to 12:40 I will be outside in St. Louis, MO! :D
Kate, I think there was a problem with the table input calculations. Supposedly for year around Vitamin D production from the sun, the location needs to be less than 35 degrees Latitude North or South of the Equator according to the Vitamin D Council.I though I was fine in the southern US at about 34 degrees Latitude. However, according to Mercola the sun altitude needs to be 50 degrees or higher above the horizon. Based on Mercola's estimates, there is no Vitamin D production where I'm living from late October to early March, and I'm way closer to the Equator than the UK.When I plug in London, England to the chart, the sun altitude maxes at 20.2 degrees around noon.The geographic info for London is:Coordinates = West 0 deg 6 min, North 51 deg 31 minTime Zone = 0 hours west of Greenwich
according to this, there is sufficient altitude for vit D production 1-6pm currently in UK.
As its midwinter I doubt I'd expose more than face and forearms, but it's a great encouragement to get outdoors.
This is a very useful link. According to Dr. Mercola, on the chart the altitude needs to be above 50 degrees to make Vitamin D from sunlight.After seeing this last year it's been the first winter where I have not tried to "rough it" sunbathing outdoors when it's freezing : )
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