Most folks are born with two kidneys, but did you know some people have three 💜 💜 💜 ? When you’re born with more than two, those extras are called supernumerary kidneys and it’s extremely rare, with fewer than 100 known cases. Having three kidneys is more common following a transplant — they hook up the new one and leave the old one in!
Want to keep your kidney and give an eraser instead? Check out our new happy organ erasers and give one kidney or twelve.