Unbeknownst to me, my GFR was also borderline prior to donation. My post-donation GFR has been low and continues to fall. I realize that everyone is different, and your motivation for donation is a factor, but I think you are lucky to find out before donating. You must seriously consider whether or not you should donate. The standards for donation have been greatly expanded in the last decade, so the research showing that donors do well post-donation does not really tell donors like myself (and you if you go through with this) anything about our futures. Frankly, had I known prior to donation what I am facing now - and I believe it was predictable - I would not have donated. I apologize for posting so much later than your original question; I rarely log in now.