Some of the greatest authors believed all humans once upon a time never ate anything other than fresh air and plenty of sunshine. Even the bible suggest there was a period when the lamb had no fear of the lion.
I suggest that by 1950 the church/government hunted down every known human age 150 and over and murdered them all. To make medicine/drugs "float" as the WAY or NEW RELIGION they had to get rid of old people.
For this reason, you don't hear about people past age 150 anymore or people who need no water/food. They still exist, "IF" they stay away from the public. If a person stands out too much in the crowd, they may find them selves locked up in a medical lab one day being cut into pieces to be examined under the micro-scope. Medical has zero problems with cutting people up for the Good of All!!! Especially when it profits their pockets.
Medical wants to find a way to live forever (for them selves), but they choose evil and never nature, so they are chasing an impossible dream, because liars/evil people never have a succesful happy life.