 I hope you had your metamucil today because the key to extreme longevity could be young guts. You ever hear of having a strong stomach? A Chinese study revealed centenarians with greater species diversity in their gut bacteria experienced less change in their microbiomes over the 18-month study, suggesting microbial diversity increases stability and resilience. Early beneficial bacteria appear to be these, but people who had these healthy bacteria showed beneficial health outcomes whether they were old or young, so start reading the labels on those probiotics. We talk frequently about the benefits of young blood and joke about having a blood boy, when maybe we should really be considering having a poo boy. Gross. Check lifespan IO for the full article and link to the study.