Fecal Transplants from Young Mice Keep Old Mice Young

The transplant reversed age-related inflammation in both the bodies and brains of the older recipient mice. Most interestingly, the transplants changed the chemistry in the hippocampus, the part of the brain attributed to learning and memory, to improve memory, learning and anxiety levels. The theory is that diversity of gut microbes decreases with age, which contributes to poor health outcomes. Introducing new microbes to old mice improved cognitive function, which could have big implications for humans in the fight against aging and neurodegenerative disorders.