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Re:Sunlight through glass does not provide Vitamin D by TACIXAT on Monday February 25, 2019 @10:26AM (#19246243)
Thankfully it was posted to HN so I could find it. Google search has a truly become useless for this stuff. It's early in the morning, but I think I'm reading the abstract right. [1]

1. https://www.ncbi.nlm.nih.gov/m/pubmed/28768407/

Re:Sunlight through glass does not provide Vitamin D by searine on Monday February 25, 2019 @10:40AM (#19246377)
Try google scholar next time instead of regular google search.
Re:Sunlight through glass does not provide Vitamin D by Strom on Monday February 25, 2019 @10:50AM (#19246440)
To add some anecdotal info, those numbers are much more closer to my own personal experience. I've been experimenting with various dosages, with regular blood tests by a doctor, for a few years now. Currently I've setteled at 4000 IU/day to stay at 75 nmol/L, which is the lower end of what is considered normal.
Re:Sunlight through glass does not provide Vitamin D by dhimes on Monday February 25, 2019 @11:10AM (#19246601)
Excellent! Thank you!