Episode
Before You Take GLP-1, Fix Your Gut (with Dr. Oscar Coetzee)
- Published
- Apr 7, 2026
- Duration seconds
- 4514
- Processing state
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- https://elizabethmcgann.com/my-podcast/
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Summary
What if the real key to successful, sustainable weight loss isn’t starting a GLP-1—but fixing your gut first? In this eye-opening episode, I sit down with Dr. Oscar Coetzee, a leading expert in clinical nutrition and gut health, to unpack the critical (and often overlooked) role the microbiome plays in metabolism, cravings, and natural GLP-1 production. We explore why starting a GLP-1 with poor gut health can backfire, how specific bacteria influence hunger hormones and dopamine, and the emerging science behind “keystone” microbes that may control up to 85% of your metabolic function. If you’re considering a GLP-1, currently on one, or looking for a more natural, root-cause approach to weight loss—this conversation is essential. This episode will change how you think about your gut—and your path to lasting results. *** SHOW NOTES [ 00:00 ] Introduction: A Critical Warning Before Starting GLP-1 [ 04:00 ] Is the Gut Actually the First Brain? [ 08:00 ] From Psychology to Microbiome Medicine [ 12:00 ] The Microbes That Control Your Hunger Hormones [ 16:00 ] The Gut as an Ecosystem (The “Earthworm” Analogy) [ 20:00 ] Why Probiotics Alone Aren’t Enough [ 24:00 ] The Real Driver of Cravings and Overeating [ 28:00 ] The Fiber Crisis (and Why It Matters) [ 32:00 ] Signs Your Gut Is Holding You Back [ 36:00 ] Functional Testing: The Missing Diagnostic Tool [ 40:00 ] Why “Killing Bad Bacteria” Can Make Things Worse [ 44:00 ] The Breakthrough: Keystone (Anaerobic) Bacteria [ 48:00 ] Case Study: Reversing Food Sensitivities Naturally [ 52:00 ] How Gut Health Directly Drives GLP-1 Production [ 56:00 ] Why GLP-1 Results Plateau (and How to Fix It) [ 1:00:00 ] The 5 Bacteria That Control 85% of Your Metabolism [ 1:04:00 ] The Hidden Cost of GLP-1 Medications [ 1:08:00 ] Testing Your M…