How Much Vitamin D Should You Take? 4.83 (96.67%) 30 votes The safe dose of vitamin D supplementation to get most of the population to the optimal level is 2,000 IU a day, but the elderly and overweight may need more.
roadblock. 1  n any condition that makes it difficult to make progress or to achieve an objective. 2  n a barrier set up by police to stop traffic on a street or road in order to catch a fugitive or inspect traffic etc.
These are the blockages/hindrances/excuses/mental obstacles like... 1  I am not good at languages. 2  I am tone deaf. 3  It is just too hard. 4  I was never any good at languages at school. 5  Others have a natural talent for languages which I don't.