Young blood reverses age-related impairments in cognitive function and synaptic plasticity in mice

Researchers connected the blood circulation of young and old mice, and also gave some older mice young blood plasma, the liquid part of blood. The older mice performed better on memory tests afterward. Their synaptic plasticity, the brain’s ability to strengthen and change connections, also improved. The study involved mice, not people, so it does not directly show that young blood helps humans.

What this means for you: This is interesting but very early evidence. Do not buy young-plasma treatments or seek blood transfusions for aging based on this study, because benefits and risks in humans remain unknown.