Is Young Blood the Fountain of Youth? Young blood reverses some brain aging in old mice By Mary Papenfuss, Newser User Posted Oct 18, 2012 12:02 AM CDT 29 comments Comments (Shutterstock) (Newser) – Vampires have known; now research mice are beginning to learn. Experiments on mice have shown that it's possible to rejuvenate animals by giving them blood from the young, according to a Standford University study. Blood from young mice reversed some of the effects of brain aging, improving learning and memory to a level similar to much younger animals, reports the Guardian. The circulatory systems of old and young mice were combined in the study so that their blood could mingle. The number of stem cells in the older brain increased, and there was a 20% increase in connections between brain cells, which affect memory and learning. The findings could one day help Alzheimer's victims. "Do I think that giving young blood could have an effect on a human? I'm thinking more and more that it might," says researcher Saul Villeda.