You should use your f'ig head, addled though it obviously is.
Did you really think that a country at those latitudes wouldn't know about the necessity of vitamin D supplementation, you condescending hoser dickhead?
How much vitamin D should a Canadian take?
Health Canada's safe upper limit is 4,000 IU per day. Osteoporosis Canada advises healthy adults aged 19-50 consume 400-1,000 IU daily, and those over 50, or younger adults at high risk, get 800-2,000 IU daily. The organization advises year-round vitamin D supplementation for all Canadian adults. Mar 29, 2015
The vitamin D dilemma: How much should we be taking ...