Lesson 8: Gut Health and GLP-1s

Does your digestion feel different on GLP-1 medications? In Lesson 8 of Thriving on GLP-1s, Registered Dietitian Megan Ostler explores how GLP-1s affect gut health and why simple, consistent nutrition habits—not restrictive protocols—are what actually support digestion, comfort, and long-term gut function.

This lesson helps you understand what gut health really means, recognize how GLP-1 medications change digestion and motility, and learn practical ways to stay comfortable and nourished instead of restricting foods or chasing microbiome trends.

This class focuses on gut health as a complex, adaptive system supported by simple inputs: fiber exposure, hydration, consistent eating patterns, and time—not supplements, elimination diets, or microbiome testing.

In this lesson, you'll learn:

• What gut health actually is and why it matters on GLP-1s
• How GLP-1 medications change digestion, motility, and gut signaling
• Why many gut symptoms on GLP-1s are functional and related to changes in intake, not pathology
• The truth about the microbiome—it's an ecosystem, not a scorecard
• How fiber and short-chain fatty acids (SCFAs) support gut barrier integrity, comfort, and motility
• Why probiotics aren't required for gut health (and when they might help)
• Why flexibility is especially important as appetite and digestion fluctuate on GLP-1s