There's evidence of GDF11 transplants (through blood in this case) that certain stem cells become active again and can affect longevity. Its not necessarily cra

There's evidence of GDF11 transplants (through blood in this case) that certain stem cells become active again and can affect longevity. Its not necessarily crazy science, its well established in mice models. If that effect is transferable to humans and if its a strong is the big question.