Young blood not really what makes old mice feel better, Harvard researchers say

The Harvard Gazette reports on work by Harvard researchers to try to figure out why young mice are more vibrant than their grandparents.

Although, yes, it's true, one of their studies basically involved sending young blood coursing through old blood vessels - in mice that had their blood systems connected - the real key seems to be one specific protein. The other study showed similar Cocoon-like results when the oldsters were injected with just that protein, GDF11, the Gazette reports.

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