Study Finds Bidirectional Link Between Gut Bacteria and Insomnia Risk Through Genetic Analysis geneonline.comSleepless Nights? Your Gut Might Be To Blame NewsweekThe gut bacteria that fuel insomnia – and the ones that protect you from it New AtlasScientists are rethinking the cause of insomnia. Here’s why BBC Science Focus MagazineReciprocal links likely between certain groups of gut bacteria and insomnia risk Medical Xpress