I'm really glad you brought up NAC... I've been reading about it and it seems like the doctor really should've recommended it for my kidneys. It speeds up the breakdown of toxins and reduces inflammation - my kidney function is about half what it should be, so I probably always have more toxins in my blood than I should have. I did an albumin test a few months ago and it showed I'm leaking protein, which I think is kindof evidence by proxy that toxins are not breaking down or leaving fast enough.