If your GFR is reduced to 70% of normal is that not as bad as donating a kidney with GFR 100 percent?

[AlexKChen]

Or is it still an issue because 70%normal of GFR kidneys are still AGED kidneys and wouldn’t have the lifespan of 100 percent fully healthy kidneys even if there were one half of them?

[Tim]

Things like diet and BP should be monitored, but a GFR of 70 is pretty good. If you have two kidneys at 100% and donate one of them, the other kidney will usually compensate for the loss. A large percentage of donors have a GFR of 60 or higher.