Usable Daylight Hours
If you live in a country where the sun does not rise much in winter, then UV levels will stay low.To counter this you may need to increase your normal dose when the sun is low.This also applies at sunset…
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If you live in a country where the sun does not rise much in winter, then UV levels will stay low.To counter this you may need to increase your normal dose when the sun is low.This also applies at sunset…