That is a tough one. Excessive sun can lead to chromosome damage which
can plant the seeds for skin cancer. Lack of Vitamin D is the fertilizer
that will allow them to multiply later. So it is likely that the
biggest problem would be excessive sun, followed later by lack of sun.
At least for me, I think that the sunscreen with vitamin D3
supplementation both when exposed to sun and when not is the best way to
go. I know people who spent a lot of time in the sun and when young
looked oh so nice with the brown tan, but now, 20 years later look 30 to
40 years older than they really are.
Marshall
Sandy wrote:
Hi Steve,
Whenever I hear someone say...stay out of the sun or slather on plenty
of sunscreen if you're going out in the sun, I just shake my head. If
they only knew that it's the vitamin D from the sun that helps prevent
skin cancers and so many other illnesses.
Of course, I'm not advocating that everyone go out and get burned to a
crisp...just get 15 to 20 minutes of sun a day if at all possible.
Interesting article, thanks for sharing.
Sandy
--- On *Mon, 3/8/10, Norton, Steve /<[email protected]>/* wrote:
From: Norton, Steve <[email protected]>
Subject: CS>Scientists find why "sunshine" vitamin D is crucial
To: [email protected]
Date: Monday, March 8, 2010, 3:47 PM
http://www.discoveryon.info/2010/03/vitamin-d.html
"The researchers found that immune systems' killer cells, known as T
cells, rely on vitamin D to become active and remain dormant and
unaware
of the possibility of threat from an infection or pathogen if
vitamin D
is lacking in the blood.
"When a T cell is exposed to a foreign pathogen, it extends a
signaling
device or 'antenna' known as a vitamin D receptor, with which it
searches for vitamin D," said Carsten Geisler of Copenhagen
University's
department of international health, immunology and microbiology,
who led
the study.
"This means the T cell must have vitamin D or activation of the cell
will cease. If the T cells cannot find enough vitamin D in the blood,
they won't even begin to mobilize."
- Steve N
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