Note that donating a kidney is not free of long-term complications for the donor. This was not emphasized in the pioneering days of donations, but is considered now.

Essentially you're halving your kidney capacity, which is not noticeable in your 20s, but will creep up on you later as you age.

It also means that any toxin or infection that attacks the remaining kidney will be an emergency. Women are especially prone to UTI that cause kidney infections.

(My father was missing part of one kidney, and it was on his mind throughout his life whenever he became ill.)

So make sure you really like the person you're donating to, since there are consequences to yourself.

Also, I hate to mention this, but the CCP has halal kidneys for sale, with a replacement guarantee even. I think you know where they're harvested from.