Interesting. I live at the 45th parallel, and try to get out into the sun everyday during the warmer months, with 5000IU orally per day during the gloomy part o

Interesting. I live at the 45th parallel, and try to get out into the sun everyday during the warmer months, with 5000IU orally per day during the gloomy part of the year. Now I'm wondering if I should get my levels checked.