"A poop transplant — otherwise known as a fecal microbiota transplant (FMT) — may help adults with long-term insomnia sleep better, a small study suggests."
https://www.livescience.com/health/sleep/poop-pills-may-ease-insomnia-by-reprogramming-the-gut-microbiome-early-study-hints?utm_source=join1440&utm_medium=email&utm_placement=newsletter&user_id=66c4c92f5d78644b3ac5d5b4