On: Plasma from exercised mice showed beneficial effects on brains of aged mice

[Aerroon]

I wonder if a bone marrow transplant would have a similar effect. If it doesn't then it would give us a clue on what probably doesn't matter here.

Edit: I should've just searched. I found this: https://www.nature.com/articles/s42003-019-0298-5#Abs1

>Young bone marrow transplantation preserves learning and memory in old mice