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There are many places and times of year where you just never cannot get enough sunlight through this method. Right now in the UK is midday, and it is completely
by stupidcar 9y ago
There are many places and times of year where you just never cannot get enough sunlight through this method. Right now in the UK is midday, and it is completely cloud covered, and this will be the case most days for a large proportion of the year.
- maelito 9y agoAs far as I know, even in sunlight, you won't get enough UV to trigger vitamin D synthesis in UK in winter.
- chippy 9y agoFor the UK, the main criteria is latitude. It's only next month in April that, even when it's sunny, people in the UK can start to get vitamin D from the Sun. (The UK is at the same latitude as Vancouver)
- mkempe 9y agoIndeed. Look for the "UV index" in your local weather reports. If it's below 3 [on a sunny day, during wintertime] it means that the low angle of the sun, even at noon, reduces UV intensity to such an extent that your skin cannot produce vitamin D.
- stordoff 9y agoMost of it is further north AFAICT - the south coast of the mainline is roughly inline with Vancouver, but then it extends a substantial distance north.