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By Charlie Campbell
May 5, 2014
TIME Health
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Aging mice gain energy, while also exhibiting greater strength and memory, when injected with the blood of younger specimens, according to a new study.

Scientists at Harvard and the University of California, San Francisco, carried out experiments on rodents with ages equivalent to humans in their 20s and 60s.

A protein called GDF11 — also found in human blood — is behind the rejuvenating properties, they suggest in research published in the journals Science and Nature Medicine. Concentration of the substance appears to decline in advanced years.

The findings could be used to treat age-related diseases such as dementia and Alzheimer’s. However, some have cautioned that stimulating the rapid regrowth of cells could possibly lead to increased risks of cancer.

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