Judy I have had severe Vit D deficiency for a few years now, I take 4,000iu 3-4 times a week and do well with that, I did 50,000 weekly and got kidney stones. But my Vit D level without it last time was 2 and before that 8! I think it is a matter of just trying doses, being on top of your labs and finding out what best works for you, because as you know, whats good for the goose is not necessarily good for the gander! Good luck finding your normal!