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UVB is what causes vitamin D production, and UVB doesn’t penetrate the atmosphere when the sun angle is below about 50deg, so if you are not out when the sun is
by pge 6y ago
UVB is what causes vitamin D production, and UVB doesn’t penetrate the atmosphere when the sun angle is below about 50deg, so if you are not out when the sun is high enough, it doesn’t help with vitamin D
- cameronh90 6y agoIt looks like in London, the sun doesn't go above 50deg except between late April and late Aug, and on the solstice it's only above 50deg between 10:30 and 15:30. Which means for the most part, it that condition only occurs while people are inside the office, and only for half of the year.
- ljosifov 6y agoExactly that. Hence a permanent recommendation by PHE and NICE, that for public health reason, most of UK residents need a supplement. Alas - it is all but forgotten. Mostly acted on for newborns, where the GP surgery, probably reminds the parents or even distribute small bottles of Vitamin D drops. (administered orally) For everyone else, the widespread Vitamin D deficiency, goes virtually unnoticed. It is the default, with no-one pushing for a change. It is a low hanging fruit, wrt Covid-19 and also seasonal flus.