I'm in Edmonton, and was advised to take 2000 IU a day by my doc. I don't tan either. Sun up here can still give you cancer, and the days are looooooong durin

I'm in Edmonton, and was advised to take 2000 IU a day by my doc. I don't tan either. Sun up here can still give you cancer, and the days are looooooong during the summer. I've also found that the direct light-on-my-eyeballs has a big difference in waking me up and making me active.