Huffpost Science
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 have a warning for do-it-yourselfers.

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