From what i understand.. Hemo makes your kidneys "lazy" (as many nurses have put it) and they, over time, stop functioning all together. Since my time with hemo was quite shoddy, I never lost anything. Although, starting PD I have lost a little bit of function (in my opinion) but the nurse says my kidneys are "taking a break" since they had to work so hard to make up for what hemo wasn't doing.