This "beauty jelly" from Japan has a weird name: Placenta 10000. What?! The placenta is the lining inside a mammal's uterus that gives nourishment to the baby. After the baby (or babies) are born, the placenta makes an appearance... and with humans, it is then usually disposed of as biowaste.
But most people do NOT rub the placenta on their faces. Do you know why? Because most people are not insane!