Most MD's are fine if you vitamin D level is over 30. 30-100 is normal. My nutritionist says being in the 80-90 range is where we should be. I went from being too low.I took some mega doses of 100,000 then I went to 10,000 a day and have been taking 5,000 units a day.
My recent level is 60 so I'm going back to 10,000 per day. My nutritionist takes 5,000 a day. I told my doctor what I was taking and she said I didn't need to take that much but she didn't tell me not to take it either. It is best to take it with calcium and magnesium and at a different time of day than when you take the rest of your vitamins.