I think the UVA rays get through glass, but not the UVB ones which are important. Dee
-------Original Message------- From: Shirley Reed Date: 04/07/2009 23:38:27 To: [email protected] Subject: CS>Vitamin D availability According to John Ott the light we get through transparent plastics and all glass (nearly all) is deficient in some respects. Some of the flowers he tried to do his time-lapse photos on simply would not proceed to the full flowering from the bud stage without exposure to light from certain sources. Some had to have full sunlight, some would flower with light through plastic but not light through glass and some were opposite in this way. I think his work caused us to have available the plant light bulbs we can now buy. And since we spend a lot of time in cars with windows up and we wear glasses and contacts while outside and the eyes use light to set some internal clocks (so I've read), and in many other ways we are perhaps light deprived---so many questions and so few carved in stone answers. Jonathan V Wright had at least one case where a female could only regulate her monthly cycle when she exposed herself to moonlight sufficiently!! And I've read that we need to be careful about taking Vit. A while supplementing with D3 to avoid toxicity. But for my part the jury is in on Vit. D3 and supplementation is definitely in order. That www.vitamindcouncil.com site is really good, imho. pj
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