Harvard stem cell biologist Amy Wagers, cardiologist Richard Lee of the Harvard-affiliated Brigham and Women’s Hospital in Boston, and their colleagues cl

Harvard stem cell biologist Amy Wagers, cardiologist Richard Lee of the Harvard-affiliated Brigham and Women’s Hospital in Boston, and their colleagues claim that a specific protein, GDF11, may explain young blood’s beneficial effects. They have reported that blood levels of GDF11 drop in mice as the animals get older and that injecting old mice with GDF11 can partially reverse age-related thickening of the heart. In two papers last year in Science, Wagers and collaborators also reported that GDF11 can rejuvenate the rodents’ muscles and brains. Seems Elizabeth Báthory was onto something: https://en.wikipedia.org/wiki/Elizabeth_Báthory https://en.wikipedia.org/wiki/Elizabeth_Báthory