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Toggle Health Problems and D

UV spectra of the sun and sunscreens

Most sunscreen block most of vitamin D and let the suntan wavelengths to get to the skin

Wanted: not block UVB, but block the UVA
Sunscreen wanted

Perhaps sunscreen pills being sold in 2012 will have a spectra more like wanted

Charts from http://www.detertec.com/sun_radiometry.html

Red = sunlight in space, Green = sunlight in Equator

Red = sunlight in space, Green = sunlight in Equator Blue = sunlight in Albuquerque, NM

Red = sunlight in space, Green = sunlight in Equator Blue = Vitamin D action spectra

No vitamin D is produced in UVA-1 or UVA-2

Red = sunlight (probably on ground); other lines = amount of light filtered thru different sunscreens

We see than many sunscreen products do NOT block the upper UVA

This might be the reason that as people feel that they can stay out in the sun longer they get more cancer while getting less vitamin D

See also VitaminDWiki

Overview UV and Vitamin D
Sunscreens which do not block UVB which makes vitamin D
UV spectra to produce vitamin D which has the following graphic

in wiki page and PDF with same title

UV spectra of the sun and sunscreens

12047 visitors, last modified 24 Jun, 2014,

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Links to this page
- Overview UV and vitamin D Vitamin D bulb for use in the home - or perhaps office Sunscreens - 80 percent are ineffective or possibly harmful - May 2015

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ID	Name	Comment	Uploaded	Size	Downloads
247	sun4.png		admin 22 Oct, 2010	59.21 Kb	16598
246	sun3.png		admin 22 Oct, 2010	56.06 Kb	3287
245	sun2.png		admin 22 Oct, 2010	63.34 Kb	2587
244	sun1.png		admin 22 Oct, 2010	45.75 Kb	2553

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