Just "D" Facts about Vitamin D

Benefits of Moderate UV Sunshine Exposure

Archive for August, 2010

Revealed: how vitamin D can protect us from cancer

Posted by D3forU on August 23, 2010

“It is the first time that scientists have found direct evidence to suggest that the “sunshine vitamin”, which is made by the skin in the presence of sunlight, directly controls a network of genes linked with a wide variety of serious disorders”.

Vitamin D is produced naturally by the skin but only in the presence of sunlight

We screened the whole genome and found all the sites where vitamin D binds. The evidence is now quite solid that not only is there binding but we’ve been able to show that it actually affects the functioning of the gene. It’s not just sticking to that region, it’s actually altering gene expression,” Professor Ebers said.

Vitamin D is produced naturally by the skin but only in the presence of sunlight. Sunshine contains ultraviolet light B (UVB) which converts a ubiquitious precursor substance in the skin, called 7-dehydrocholesterol, into vitamin D3. This can then be converted by the liver and kidneys into the biologically active form of vitamin D.

By far the easiest and best way of delivering enough vitamin D to the body is to expose unprotected skin to direct sunlight for a few minutes each day. But light-skinned people are advised not to burn their skin.

Revealed: how vitamin D can protect us from cancer – Science, News – The Independent

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5-10 Minutes of Sun Exposure Equals What?

Posted by D3forU on August 16, 2010

“In general, 5 to 10 minutes a day between 10 a.m. and 3 p.m.

with minimal clothing is considered good.”

This advise works with qualifications. You can make ~2300 IU of Vitamin D IF:

42° N Latitude USA

A) 10 minutes Full Exposure Face Up (or Down) in bikini or boxers 45% exp.
B) You are Skin Type (ST) 2 with no previous sun exposure
C) Location is 42° N Lat Clear Skies August 13th +/- 2 days @ 12 Noon
D) Almost forgot. You are 20 years old.

ST 3’s can make ~1400 IU is same time frame. 17 min to 2300 IU
ST 4’s can make ~1000 IU is same time frame. 22 min to 2300 IU
ST 5’s can make ~600 IU is same time frame. 37 min to 2300 IU
ST 6’s can make ~400 IU is same time frame. 55 min to 2300 IU

Every 25% “Base Tan” reduces Vitamin D production 25%
Every 10 Years reduces Vitamin D production by 10%

Every Hour Before or After Noon reduces another 20%

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