2000 IU is not very much. I suggest starting at 1000 iu per 25 pounds of body weight for light skinned individuals, and then testing and adjusting accordingly. (say, 1000 iu for every 10 ng/ml you want to increase)
And starting from there I suggest adding MOAR D until your bloodwork puts you in the mid-high range. ;)
2000 IU is not very much. I suggest starting at 1000 iu per 25 pounds of body weight for light skinned individuals, and then testing and adjusting accordingly. (say, 1000 iu for every 10 ng/ml you want to increase)
And starting from there I suggest adding MOAR D until your bloodwork puts you in the mid-high range. ;)