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Blood of Young Mice Reverses Signs of Aging in Older Ones

Two new studies show that young blood reverses signs of aging in old mice, but that doesn't mean scientists have finally found the elusive fountain of youth. However, the discovery could one day help people lead healthier lives. In two papers published in Science, Harvard University researchers in Boston describe how the protein GDF11, found in higher levels in the blood of young mice, improved the brain and muscle function of older mice. GDF11 appears to work by stimulating the...

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