The risk due to kidney donation is very small - the same as some cosmetic surgeries, like liposuction[10] On average, screened live kidney donors live longer than individuals with two kidneys[10] Using legalized organ markets, both the donor and recipient would have more protections than they would on the black market[10] The donor's remaining kidney will expand to fill the gap left by the donated kidney. A second kidney has almost no benefits, as the kidneys usually fail simultaneously.[17] A kidney received from a living donor usually lasts years longer than a kidney received from a dead donor[17] On the black market, donors may not get sufficient post-operative care[18]