How to eat for success on weight-loss drugs

The Food Chain

This episode explores how GLP-1 weight-loss medications fundamentally alter appetite, digestion, and the brain's relationship with food. Host Ruth

Key takeaways

• Federica Amati explains that GLP-1s mimic gut hormones to slow gastric emptying and suppress 'food noise,' making micronutrient intake critical due to drastically reduced food volume.
• Whitney Black describes her experience as a hyper-responder who faced severe nausea and meat aversions, recommending simple carbs initially before transitioning to structured protein and fiber meals.

Main topics

• GLP-1 medication mechanisms
• Managing gastric side effects

Notable quotes

"Now the food don't control me, I control the food."

Conclusion

The episode delivers medically grounded, actionable dietary strategies

Transcript preview

Speaker 3 (0:00) This BBC podcast is supported by ads outside the UK. Speaker 5 (0:05) Would you ever move to a tiny remote island with only three other inhabitants? The BBC's Georgina Ranard and her partner are swapping city life for baby lambs on this Welsh island. Sometimes parts of the island are covered by waves. So what's it like living without any shops, a gym or even cars? I'm Hannah Gelbart. Come join us on What In The World, an award-winning daily podcast from the BBC World Service. You can listen wherever you get your BBC podcasts. Speaker 4 (0:36) So, quick summer recap? Speaker 2 (0:38) Heat waves, data leaks, AI hacks, folding phones, and a viral, spinally challenged raccoon. Yeah, Speaker 4 (0:43) I think that covers it, right? I'm Thomas Germain. I'm Speaker 2 (0:47) Jess Maddox, and The Interface is back from its summer break. Speaker 4 (0:49) New season, new co-host, same deep dives into the tech that's shaping our world and our lives. Speaker 2 (0:56) So before AI wipes out all of humanity, Speaker 4 (0:58) allegedly, join Speaker 2 (1:00) us for The Interface. Speaker 4 (1:01) Listen on BBC.com or wherever you get your podcasts. Speaker 3 (1:11) I still remember vividly that first day after my first shot, I think it had gotten to maybe about 3pm and then I realised, oh, I haven't eaten today because I wasn't thinking about food. Speaker 1 (1:22) Weight loss medicines can dramatically change your relationship with food. Speaker 7 (1:27) Now the food don't control me, I control the food. Speaker 1 (1:30) This is The Food Chain from the BBC World Service with me, Ruth Alexander, and today we're finding out what to eat while on these medications. Speaker 6 (1:39) I would argue that these drugs make what you eat even more important. From Speaker 1 (1:44) managing side effects and getting the nutrition you need to what happens when you stop the treatment. I'm joined by Federica Amati, Research Fellow at Imperial College London's School of Public Health and Nutrition Lead at the School of Medicine there. She's also author of the book The Appetite Reset. Also with us is Whitney Black, a registered dietitian in Nebraska, the United States, who works with patients taking the medication and also takes it herself. And Michelle Herum in Denmark, who's been managing her weight with the medicine over the past three years. And by the way, this programme isn't offering medical advice. If you're considering these treatments or have questions about them, you should speak to a qualified healthcare professional. Speaker 1 (2:29) Federica, the basics first of all. What are GLP-1s, as these drugs are known, doing in the body and why do they affect your appetite? Speaker 6 (2:38) So these drugs mimic a hormone that is produced by our bodies in our gut and they have the same effect of that hormone but just much louder and for much longer. And this means they impact the pancreas, so how your pancreas secretes insulin after a meal. They also impact your gut. So how quickly or slowly your stomach moves food through the gut and how it moves through the rest of your gut, which is why we see gastric side effects like constipation and nausea and vomiting. And they also affect your brain. So they speak to your brain and sort of tone down those hunger signals and what's known as food noise. Speaker 1 (3:16) What's food noise Speaker 7 (3:17) like, Michelle? For me, it was like my brain was always wrapped around food. I was thinking about food all the time. If we were out driving, then I was wondering, could we just step by the nearest fast food place? Or if it's weekend, can we get some sweets or a good meal? Always wrap around food, where now I don't think about food Speaker 1 (3:43) in the same way. The drugs have just stopped that. Speaker 7 (3:46) Yeah, it took it away. And now the food don't control me, I control the food. Speaker 1 (3:51) Whitney, what's food noise like in your experience? Speaker 3 (3:54) Yeah, I would agree. It's really intense. This past summer, I did a brief little stint. I switched from one of the injectables to one of the oral medications just to try it out. And during that transition period, I was having intense, like it was coming back. And it just felt like I was a bottomless pit. Like I would eat food and I would eat. satiating nutrient dense food. And then I would still have those thoughts in my brain that said, okay, well, there's still some left. We can still eat more. The rational part of my brain was saying, oh, we had a good portion. That was enough. We feel full. But then, you know, again, that noise was just there constantly just saying, no, it was really good. We enjoyed that. We need to eat more, just more, more, more. And so when you've lived it, when you've gone from being so consumed by it to having these medications that does help silence it, it's so freeing. That is the best way that I can describe that. It is just, it's so freeing. That Speaker 1 (4:57) is so interesting. And Michelle, for you, when you started taking the drugs, what did all that feel like in reality? I felt Speaker 7 (5:06) the nauseous. Actually, when people ask me how it feels to take the medication, I always say it feels like being pregnant in the first trimester. I feel nauseous and I feel tired and my taste was different. All of a sudden, I couldn't drink coffee anymore. Whitney, was it similar for you? Speaker 3 (5:27) Yes, for myself, I was what... many people consider like a hyper responder. That first shot the first day I had nausea, I had extreme appetite suppression. But it's really interesting when I look at, you know, anybody that I work with that are taking these medications, there really is such a spectrum of people that notice symptoms and all of the side effects right away. And then I have some people who they really don't start noticing things until they are on those higher doses. Speaker 1 (5:57) And this is an important point, Federica, isn't it? That the drugs won't affect everybody in exactly the same way. Speaker 6 (6:04) No, and why should we expect them to? We're all different. We all have different levels of expression of the receptor itself. Some people are extremely sensitive to the gastric effects, others less so. And the movement of the gut itself is slowed down in some people with these drugs. That also contributes to this feeling of fullness in the stomach because it stays fuller for longer. And it also contributes to the side effects that we know most commonly afflict people who take these drugs. So nausea, vomiting, reflux and constipation. Speaker 1 (6:33) And of course, the point about the drugs is that they make you eat less. But is what you eat still important, even if you're eating a lot less of it? I Speaker 6 (6:44) mean, I would argue that these drugs make what you eat even more important because you have less opportunity. to consume the foods that have the nutrients. And with many people taking these medicines, they will have reduced metabolic health. So they're already coming from a place where their body may be struggling with certain nutrients. And we know that micronutrient deficiencies are a concern in people who take these medicines without the correct nutritional support. So I think the key here is that if people are taking these medicines with the correct support and the correct knowledge on how to build healthy, nutritious meals. then these medicines can be really effective and very, very, very safe. But what I see as the biggest risk is people who take these medicines and then they continue to diet. So they continue to restrict their food intake whilst on these medicines. You know, the medicines are doing the caloric restriction for you. What the