I posted about
a study I read about
on how to calculate what you need to add based on your vitamin D level. It was something like 100 units D for every 10 you are low.
My level was about like yours. I take 2000 units twice a day unless I'm working in the sun. then I skip the afternoon dose.
Some doctors have patients taking 5000 units or 10,000 until the blood level comes up. I would follow doctor's orders. It's usually for a short term or not daily dosing, then the amount goes down.
It has been shown, according to that study, that 10,000 units a day over a long time can lead to toxicity, as was mentioned by ak angel.
I got my husband to start taking 2000 units of D most days. He used to get large brown spots on his legs, iron deposits left from bruising. In a couple of weeks the spots went away!
According to other reports, although I haven't read any scientific studies, Vitamin K, boron, zinc and magnesium are also needed in order to use D.