NEW YORK -- If Mickey Mouse is feeling his age at 86, scientists may have found just the tonic: the blood of younger mice.
Older mice got stronger, exercised longer and performed better mentally after they were injected with blood from young mice, or even just with a substance that's more abundant in younger blood.
Someday, if more research goes well, this may lead to a way to treat some infirmities of old age in people. In the meantime, scientists warn that people shouldn't try this themselves.
The mouse work was reported online Sunday in three papers in the journals Nature Medicine and Science.