Young blood has rejuvenating, anti-aging properties that scientists are trying to tap into. A new study published in the journal Cell Reports now brings us one step closer to determining what it is in the young blood that age-reversing properties.

A few years ago, scientists discovered that when they gave young blood to old mice, something pretty astounding happens in their brains. The older mice get more stem cells, produce more neurons, the connections between their neurons become stronger, and their spatial memory improves. The effects of aging in the brain are, in large part, reversed.