Hello,
Im working on a little project for school in which we want to study the effects of Vitamin D3 on T-cell proliferation. For this project we couln't get active Vitamin D3 so we use 10 ug Vitamin D3 pills which you can buy in the supermarket. On the internet we found the working concentration of 500 ug/ml, but this is too much if we want to use these pills. Can anyone give us some advice on this?