Join Food Sleuth Radio host and Registered Dietitian, Melinda Hemmelgarn, for the second half of her 2-part interview with Justin Sonnenberg, Ph.D., assistant professor in the department of microbiology and immunology at Stanford University School of Medicine, and author of The Good Gut: Taking Control of Your Weight, Your Mood, and Your Long-Term Health. Sonnenberg discusses the overuse of antibiotics, the potential and confusion over probiotics, the gut-brain connection, "leaky gut," and how our gut bacteria change with aging. Produced by Dan Hemmelgarn.