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I think this might be a good place to add this reminder: "Vitamin D is made when UV (more precisely, UVB rays) react with a compound (7-dehydrocholesterol) in
by dieselerator 4y ago
I think this might be a good place to add this reminder:
"Vitamin D is made when UV (more precisely, UVB rays) react with a compound (7-dehydrocholesterol) in the skin. The best rays for UV synthesis have wavelengths between 270–300 nm." [1]
[1] https://www.sciencelearn.org.nz/resources/1313-vitamin-d-and-uv https://www.sciencelearn.org.nz/resources/1313-vitamin-d-and...
- lightedman 4y ago270nm is UVC territory. Did you mean 280nm instead?
- dieselerator 4y agoThat is a fair question. This is what I find. [1] Ultraviolet B UV‑B 280–315 Ultraviolet C UV‑C 100–280 [1] https://en.wikipedia.org/wiki/Ultraviolet https://en.wikipedia.org/wiki/Ultraviolet My read is "UVB" is the popular medicine way of saying UV is needed for the body to synthesize vitamin D. It was not considered necessary to point out part of the useful spectrum is in "UVC" territory.
- hinkley 4y agoAlso kills microbes on surfaces.