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For more than 10 years, scientists have been experimenting with the bloodstream of young and old rats. In one study, older and younger rats were surgically attached and it was found that the older rats lived longer with the shared bloodstream. This study sparked a decade-long exploration to understand the effects of material transplanted from young bodies to old bodies and its potential to rejuvenate the older ones.
In a recent study, Joe Castellano, a neuroscientist at Stanford University School of Medicine, has discovered a protein in human umbilical cord blood that improves learning and memory in aging mice. It’s an exciting find in the field of regenerative medicine. Castellano cautions that there is no indication this would work in humans yet.