Have you come across any real life Benjamin button?

Of course, I'm referring to Brad Pitt's character in the movie "The curious case of...". In the movie the eponymous character ages in reverse and gets younger as time passes. Historically there have been very few documented cases where people preserved their youthful looks for a long time than normal. I have heard Sadhguru and certain Buddhists talk about a concept called Kaya kalpa. Essentially this is a concept where the body preserves its youth and vigor for a long period of time. This is achieved through certain yogic practices and a change is every day lifestyle. Some of us might have also come across such people in our daily life. School reunions are a good source for this.People who either stayed young for a long time or their aging seemed to have slowed down with respect to their looks and body. Whether they have just won the genetic lottery or doing something very right even unconsciously.