They do a BMP and GFR on me every month. My labs are only trending not over the limit yet...I watch trends.

I did read a link on low vit. D, osteopenia, osteomalacia, associated with low bicarb. It sounds like a lot of people can have a subclinical acidosis.

Anyway, as long as the kidneys hold, then the ivig will continue. It is a lot of protein to excrete and I am sure it takes a toll. It seems to me, they could mitigate the low bicarb before it is a problem.