Hungry all the time? Struggling with weight management? Wondering if those GLP-1 drugs everyone's talking about are right for you? Dr. Harriët Schellekens, senior lecturer in Anatomy and Neuroscience at UCC and leading expert on the hunger hormone ghrelin, joins us to unpack the complex biology of appetite, weight, and why willpower alone isn't the answer.
From gut hormones to microbiome signaling, Harriët explains how your body decides when you're hungry, why ultra-processed foods hijack your brain's reward system, and how your gut bacteria might actually be driving your food cravings. If you've ever felt like your biology is working against you, this episode will help you understand why - and what you can actually do about it.
Topics covered:
What GLP-1 drugs actually do - and who they're really for
The hunger hormone ghrelin and how it drives food intake
Why obesity is a disease, not a lifestyle problem
The pre-digestive vs. post-digestive mismatch in ultra-processed foods
How high-fat, high-sugar foods create a "false promise" in your gut
Sugar substitutes: the good, the bad, and the gut-friendly
How your gut microbiome influences weight gain and food preferences
Why crash diets backfire (and what to do instead)
The role of stress, cortisol, and emotional eating
Early-life food exposure and how it shapes lifelong eating habits
Probiotics, prebiotics, and targeting the microbiome for better appetite control
Practical tips for parents navigating kids' diets and food choices
The bottom line? Your food choices aren't just about willpower - they're about biology. Understanding how your gut, brain, and microbiome communicate can help you make better decisions, break unhealthy cycles, and stop fighting your own body. Don't eat less. Eat better.
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