Doctor and special correspondent, Avir Mitra takes Lulu on an epic journey live on stage at a little basement club called Caveat, here in New York. Starting with an ingredient in breastmilk that babies can’t digest, a global hunt that takes us from Bangladesh to the Mennonite communities here in the US, we discover an ancient symbiotic relationship that might be on the verge of disappearing.  So sip a vicarious cocktail, settle in, and explore the surprising ways our bodies forge deep, invisible connections that shape our lives. This live show is part of a series we are doing with Avir that we are calling “Viscera.” Each event is conversation that takes the audience on journey into a quirk or question or mystery inside of us, and gives them a visceral experience with the viscera of us. The previous installment of the series, was called “How to Save a Life.” Special thanks to Tim Brown, David Mills, Carlito Lebrilla, Bethany Henrik, Danielle Lemay, Katie Hinde, Jennifer Smilowitz, Angela Zivkovic, Daniela Barile, Mark Underwood EPISODE CREDITS:Reported by -Avir Mitrawith help from - Anisa VietzeOriginal music from - Dylan KeefeSound design contributed by - Dylan Keefe, Ivan BarenFact-checking by -Natalie Middleton. Signup for our newsletter!! It includes short essays, recommendations, and details about other ways to interact with the show. Sign up (https://radiolab.org/newsletter)! Radiolab is supported by listeners like you. Support Radiolab by becoming a member of The Lab (https://members.radiolab.org/) today. Follow our show on Instagram, X (formerly Twitter) and Facebook @radiolab, and share your thoughts with us by emailing [email protected] support for Radiolab’s science programming is provided by the Simons Foundation and the John Templeton Foundation. Foundational support for Radiolab was provided by the Alfred P. Sloan Foundation.