We have known for a while that obesity has a microbial component. Now, a team of scientists led by Patrice D. Cani reports a novel bacterium isolated from the human gut that counteracts diet-induced obesity, inflammation and glucose dysregulation in mice.

Joe Hanson, from the YouTube channel It’s Okay to Be Smart, tells the story of the gut microbiota and its important role in human health, with the help of entertaining sequences of images and texts.