Potent Ponderings

What if the secret to immortality was something simple yet crazy, like scab serum?  You know; that oozing liquid that forms new skin?  Yet you'd have to injest it; you couldn't, say, get an injection or some ointment.   I wonder if you could tolerate drinking eight ounces once a week?   For the sake of life immortal! For how long could one keep up treatment?!  What sort of lengths would people go to get it once demand spiked?  Especially if it made them look younger and better too?  Why couldn't it just be something good and plentiful, like banana?