The amount of vitamin D should get is still a question. However, Australian dermatologists are now recommending 15-20 minutes of sunshine each day and have reversed their zero-tolerance stance on the sun. If you do not go outside and get some sun, 600-800 units of vitamin D per day is a good supplement. However, 2000 units is too much.

- European Congess Endocrinology 4/28/2013