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by secabeen 2150 days ago
Yep. I work inside a lot, so I started taking 5000IU of D a day. After two weeks, I had my levels tested and it showed a level of 37. When fall comes around, and I'm outside even less, I'll probably up the dosage for a week or two, then test again. Target is between 50 and 70, so I definitely need more.