[pct-l] Study on effectiveness of umbrella for UV protection

[Tortoise]

Suggest you read up on Mercola. See https://en.m.wikipedia.org/wiki/Joseph_Mercola
Follow his advice at your own risk.


Tortoise

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Dictated / Typoed on my iPad.

> On Mar 13, 2015, at 06:13, James Vesely <JVesely at sstinternational.com> wrote:
> 
> Other studies are showing that sunlight is not so bad for your health after all.   It has been know that people living in low sunlight regions have higher cancer rates.    
> 
> Interesting info:  http://articles.mercola.com/sites/articles/archive/2011/11/20/deadly-melanoma-not-due-vitamin-d-deficiency.aspx
> 
> 
> Jim 
> 
> -----Original Message-----
> From: Pct-L [mailto:pct-l-bounces at backcountry.net] On Behalf Of Betty Wheeler
> Sent: Thursday, March 12, 2015 7:08 AM
> To: pct list serve
> Subject: [pct-l] Study on effectiveness of umbrella for UV protection
> 
> This study demonstrates the effectiveness of all umbrellas (and not just ones with special coating like the Chrome Dome) in providing UV protection.
> http://www.today.com/health/sun-umbrella-can-protect-against-harmful-rays-1C8995807
> 
> According to a U.S. study published in JAMA Dermatology, any fully-functioning handheld umbrella can block more than three-quarters of ultraviolet (UV) light on a sunny day. Black ones do even better, blocking at least 90 percent of rays... . [Researchers] collected 23 working umbrellas - no fabric tears allowed - from people at their medical school.
> On a sunny morning they used UV devices to measure radiation just under each umbrella's fabric, and by the nose of the person using it - and then compared this to umbrella-less radiation readings.
> 
> All but one of the umbrellas was a standard, handheld rain umbrella. The other was a travel sun umbrella.The sun umbrella blocked more than 99 percent of UV rays. Regular umbrellas worked well too, blocking at least 77 percent of UV light - and more, if the umbrella was darker coloured.
> 
> ​So: at least 77% block from any umbrella without tears in the fabric; at least 90% from a black umbrella; and 99% from a travel sun umbrella.​
> 
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