Vitamin D and the sun at noon

Abe · Family Member Joined: Apr 11, 2007 Posts: 32

Interestingly it has been found that the best time to get UVB is around noon. Hopefully this is useful information for any of you who are lucky enough to live in a country with a reasonable climate and get your vitamin D naturally. Meanwhile I'll keep popping D3 pills in the gloomy UK!

From:
http://articles.mercola.com/sites/articles/archive/2008/09/04/when-should-you-go-out-in-the-sun.aspx?source=nl

“Our recommendation, this is based on work in England and Norway, and the United States, that the optimal time to be in the sun for vitamin D production is near to solar noon as possible. That would be between say 10:00am and 2:00pm.

The reason is two-fold.

First of all, you need a shorter exposure time because the UVB is more intense.

Now, the second reason is that when the sun goes down towards the horizon, the UVB is filtered out much more than the UVA. And it turns out that the long wave of ultraviolet called UVA, which runs from about 320 to 400 nanometers, is highly correlated with melanoma -- where the UVB is the one that produces the vitamin D, and that’s from 290 to 315 nanometers,” Dr. Grant explains.

jimmylegs · Family Elder Joined: Mar 12, 2006 Posts: 2098

good stuff abe

Loriyas · Posted: Wed Sep 10, 2008 7:18 am Post subject:

Interesting, because this is exactly when dermatologists tell you to stay out of the sun! So again, less sunshine, less vitamin D.......more MS???? I always thought it didn't make sense to stay out of sunshine and I have always felt better with it. Everything is moderation....
Lori

DIM · Posted: Mon Sep 29, 2008 2:21 am Post subject:

I don't think 20 minutes sunshine per day at the noon can cause you any cancer at all, probably they protect you from it!