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Glass windows block the part of the UV spectrum that is needed to make Vit D. https://www.nytimes.com/2019/02/08/well/live/does-sunlight-through-glass-provide-
by James_Henry 6y ago
Glass windows block the part of the UV spectrum that is needed to make Vit D.
https://www.nytimes.com/2019/02/08/well/live/does-sunlight-through-glass-provide-vitamin-d.html https://www.nytimes.com/2019/02/08/well/live/does-sunlight-t...