The Real Reason You Can't Stop Eating (It's Not Willpower)

Mark Hyman, MD Mark Hyman, MD • Sep 23, 2026

Audio Brief

Show transcript
Why is changing how we eat so difficult when we have more nutrition knowledge than ever? On his podcast, family physician and best-selling author Doctor Mark Hyman sits down with clinical psychologist and body image expert Doctor Rachel Goldman to find the answer. By the end of this summary, you will understand how biology and psychology drive your food cravings, and how to interrupt those cycles. Why knowing what to eat is not enough to change how you eat. While willpower might be a small piece of the puzzle, Doctor Goldman stresses that consistent behavior change is much more complicated, cautioning twice that we cannot use cognitive behavioral therapy to think our way out of biology. How fast-digesting carbs hijack the brain like addictive drugs. Doctor Hyman shares a Harvard study by his colleague David Ludwig where blinded participants drank two milkshakes that were identical in calories, nutrients, and taste, differing only in a fast-acting versus a slow-absorbing carbohydrate. Functional MRI brain scans and blood work showed the fast-acting shake spiked insulin and blood sugar, and lit up the brain's dopamine addiction center, the exact area triggered by heroin and cocaine. Why society's body ideals leave us feeling inadequate. From a young age, media, celebrities, influencers, and family project constant messages about how we should look, causing people to internalize these ideals, compare themselves to others, and feel like they fall short. How a single waking thought can steer your entire day. Doctor Goldman explains that one automatic thought upon waking, like hating your legs, alters your mood and dictates what you wear or whether you even show up to work. That self-critical thinking also drives the cookie paradox and the restriction-binge cycle. According to Doctor Goldman, sitting down to mindfully enjoy a cookie causes no harm, but impulsively eating it over the counter and thinking you should not have done that sparks guilt and shame that drives a cycle of bingeing and renewed restriction. How slowing down can ruin the appeal of junk food. Doctor Hyman illustrates this with a story from nutritional psychologist Marc David, who told an executive he could eat his usual drive-thru Whopper only if he went inside, sat down, took five breaths, and mindfully enjoyed every bite. When the client actually paid attention, he found the burger disgusting and could not finish it. Why stress and poor sleep force your body to hoard fat and crave sugar. Doctor Hyman recalls working emergency room night shifts from eleven at night to seven in the morning in his thirties, surviving on triple espressos, ice cream, and McDonald's apple turnovers because sleep deprivation hijacks appetite. When the pursuit of healthy eating becomes unhealthy. Doctor Goldman explains that unlike anorexia, where the goal is weight loss, orthorexia starts as a common desire to be healthier that turns into a rigid obsession, impairing daily life and causing nutrient deficiencies. How new weight-loss medications quiet the mental chatter around food. Doctor Goldman defines food noise as an intrusive preoccupation with what and when to eat next, functioning like a volume dial in the brain. GLP-1 weight-loss medications turn down this volume, though she cautions it does not just vanish for everyone, freeing up mental bandwidth for psychological work. Remember that freedom lies in the pause between a craving and your response. Put a note saying pause on your refrigerator, and apply Doctor Goldman's fridge test: if you are searching through doors, it is an emotional void, but if you would gladly eat a bowl of fruit sitting on the shelf, you are physically hungry.

Episode Overview

  • Host and Guest Context: Family physician, podcast host, workshop leader, and #1 New York Times best-selling author Dr. Mark Hyman joins clinical psychologist, body image expert, former bariatric surgery department clinician, and author of When Life Happens: The Mindset Shift You Need to Manage Stress, Build Confidence, and Break Free (drrachelnyc.com), Rachel Goldman, PhD, to explore why changing how we eat is so difficult despite having more nutrition knowledge than ever.
  • Biology vs. Willpower: With 75% of Americans overweight, the episode reframes weight and eating struggles not as a lack of information or weak willpower, but as a complex interaction between brain chemistry, food-industry hijacking, stress physiology, sleep, and cognitive patterns.
  • The Psychology of Eating: The conversation traces how social conditioning, automatic negative thoughts, emotional eating habits, and rigid restriction-binge cycles drive our relationship with food—and how Cognitive Behavioral Therapy (CBT), mindfulness, and nervous system regulation can interrupt these loops.
  • Food Noise and Modern Interventions: The discussion concludes by defining "food noise," examining the difference between healthy eating and orthorexia, and evaluating how GLP-1 medications and bariatric surgery interact with underlying psychological habits. *(

Key Concepts

  • Information vs. Behavior Change: Dr. Goldman emphasizes that people do not suffer from an information problem regarding what to eat; the challenge lies in consistent behavior change. While she hedges that willpower might be a small piece of the puzzle, she stresses that it is much more complicated than willpower alone, and twice cautions that "we can't CBT our way out of" biology.
  • Biological Hijacking and Cravings: Dr. Hyman cites a crossover "milkshake study" by his Harvard colleague David Ludwig, where blinded participants served as their own controls on different days, drinking two milkshakes identical in calories, protein, fat, carbohydrate, fiber, and taste, differing only in a rapidly acting (high-glycemic) vs. slow-absorbing (low-glycemic) carbohydrate. Blood work and functional MRI (fMRI) imaging showed the high-glycemic shake raised insulin, triglycerides, cholesterol, and blood sugar, and lit up the nucleus accumbens—the brain's dopamine addiction center triggered by heroin and cocaine. Conversely, Dr. Hyman shares an anecdote of a sugar-addicted workshop participant whose cravings vanished by the 2nd day of a diet removing sugar, processed foods, refined carbs, and starches, alongside Dr. Goldman citing her own past brain imaging studies using transcranial direct current stimulation (tDCS) to modulate a brain region and decrease food cravings while participants viewed food images.
  • Social Conditioning and Body Image: From a young age, society, media, celebrities, influencers, and family project messages about how we "should" look. Repeated exposure causes people to internalize these ideals, compare themselves to others, and feel inadequate.
  • The Cognitive Behavioral Therapy (CBT) Triangle: Thoughts, emotions, and behaviors form an interconnected cycle. A single automatic thought upon waking (such as hating one's legs) alters emotional state and dictates daily behaviors (like what to wear or whether to show up at work). Rigid cognitive distortions—like all-or-nothing thinking, "should" statements, jumping to conclusions, and catastrophizing—can be identified by the negative feelings they produce.
  • The "Cookie Paradox" and the Restriction-Binge Cycle: According to Dr. Goldman, sitting down to mindfully enjoy a cookie causes no harm; rather, impulsively eating it over the counter triggers a secondary thought ("I shouldn't have done that"), sparking guilt and shame. Similarly, long-term dietary restriction leads to a breaking point of overeating or bingeing, followed by shame ("I'm so bad"), which drives renewed restriction, over-exercising, or purging.
  • Mindless vs. Mindful Eating: Cultural conditioning often trains children to use sugar and food as a reward or emotional medication, which over time turns soothing stress or anger with food into an automatic, impulsive behavior. To illustrate mindful eating, Dr. Hyman shares an anecdote from nutritional psychologist Marc David, who told a busy executive client that he could eat his usual drive-thru fast-food Whopper only if he went inside, sat down, took 5 breaths, and mindfully enjoyed every bite—resulting in the client finding the burger disgusting and being unable to finish it.
  • Stress Physiology and Sleep Deprivation: Dr. Hyman explains that every fat cell is innervated by the nervous system; under stress, the brain puts fat cells into a survival "storage mode" rather than a metabolic mode. Sleep deprivation similarly hijacks appetite: Dr. Hyman recalls working ER night shifts in his 30s (working 11:00 PM to 7:00 AM, driving in at 10:00 PM) and surviving on triple espressos, half a pint of ice cream, giant chocolate chip cookies, and 2:00 AM McDonald's apple turnovers. Even today, he admits to occasional emotional eating ("a pint of Chunky Monkey") and notes that when sleep-deprived, he craves sugar, pasta, rice, and potatoes.
  • Orthorexia vs. Anorexia: Dr. Hyman notes that "ortho" means to straighten or correct. Dr. Goldman explains that unlike anorexia (where the goal is weight loss), the goal of orthorexia is to become healthier—a common goal that becomes problematic when it turns into a rigid obsession and preoccupation that rules a person's life, impairs socializing and daily functioning, causes distress, and leads to nutrient deficiencies. (Dr. Goldman jokingly hedges to Dr. Hyman that while she is not diagnosing him, she would say he does not have orthorexia).
  • Food Noise and GLP-1 Medications: Dr. Goldman clarifies that "food noise" is not a clinical diagnosis, defining it instead as an intrusive preoccupation with food (constantly thinking about what and when to eat next, or if one ate enough), functioning like a volume dial. GLP-1 medications turn down this volume—though she cautions it doesn't just go "poof, it's gone" for everyone, as for some it is simply quieter. Lowering this noise frees up mental bandwidth for CBT and psychological work to finally click and proves to patients that their struggles are biological, though neither GLP-1s nor bariatric surgery will automatically create happiness or fix stress, sleep, relationships, or body image without psychological work.
  • Physiological Support, Aging, and Disclosed Sponsors: Throughout the episode, Dr. Hyman highlights specific physiological mechanisms alongside sponsor promotions and disclosures:
  • Gut Microbiome (Seed): Dr. Hyman discloses he joined Seed's clinical board and promotes DS-01 Daily Synbiotic (a 24-strain probiotic and prebiotic) at seed.com/hyman (code 25HYMAN for 25% off the first month), citing it as clinically validated to support the gut barrier and studied in the "largest clinical trial for a probiotic on bloating and gas in both men and women as of February 2026."
  • Perimenopause/Menopause Protein Needs (BodyHealth): Around perimenopause and menopause (40s, 50s, and beyond), declining estrogen makes building and maintaining muscle less efficient, increasing protein needs. Dr. Hyman promotes PerfectAmino (delivering all 9 essential amino acids in a pre-digested form that reduces cravings when taken in the morning) at bodyhealth.com (code HYMAN20 for 20% off the first order).
  • Mitochondrial Renewal (Timeline): Mitochondrial decline drives age-related loss of energy and strength; Dr. Hyman promotes Mitopure (Urolithin A, a postbiotic supporting mitophagy) at timeline.com (code HYMAN for 20% off).
  • Estrogen Clearance (RHO Nutrition): Mood swings, hip weight, skin issues, and PMS are often estrogen metabolism/clearance problems rather than level problems. While DIM in cruciferous vegetables supports clearance, one would need to eat "pounds of broccoli a day" for a therapeutic dose; Dr. Hyman promotes sponsor RHO Nutrition's Liposomal DIM at rhonutrition.com (code HYMAN for 20% off sitewide).
  • Additional Promotions: Dr. Hyman also promotes Sunlighten Infrared Saunas at sunlighten.com (code HYMAN to save up to $2,100 plus free shipping) and Seatopia Clean Seafood Box at seatopia.fish (code HYMAN for free shipping on the first box).

Quotes

  • At 0:00:00 - "That this is not just a matter of being weak willed, or not having willpower, or our brains and our microbiome have all been hijacked by the food industry." - Dr. Hyman framing why modern eating struggles are rooted in biology rather than personal failure.
  • At 0:02:40 - "Knowing what to eat and being able to do it consistently are two different things, and I think that's really important to remember because people know what to eat, there's not an information problem, there's not a lack of knowledge out there, but it's how to do the behavior change, and it's not just simply willpower." - Dr. Goldman explaining the gap between nutritional knowledge and daily execution.
  • At 0:04:58 - "So if somebody were to compliment somebody's, say, weight loss or the way that they look, and maybe they're participating in an unharmful—I'm sorry, maybe they're participating in a harmful behavior or an unhelpful behavior to get that body to look that way or to look a certain way, what we're really doing is reinforcing that negative behavior." - Dr. Goldman detailing why commenting on weight loss can inadvertently encourage disordered eating or mask illness.
  • At 0:07:12 - "But one thought can literally change the course of our day, so I really like to remind people to be super mindful of the way that they're talking to themselves, because we all have these automatic thoughts, but it's acknowledging that the thought can influence how we feel and our behaviors." - Dr. Goldman illustrating the CBT triangle in everyday body image struggles.
  • At 0:14:00 - "If you really want the cookie, have the cookie, because it's not about the cookie, it's the thought that follows the behavior that matters more." - Dr. Goldman explaining how post-eating guilt and shame drive disordered eating cycles more than the food itself.
  • At 0:17:47 - "If you are opening and closing a refrigerator or a cabinet and searching for something, you are emotionally hungry, there is a craving you are having and it is a emotional void you are trying to fill, but if you open the refrigerator and you see a bowl of fruit sitting there and you are actually physiologically hungry, you're going to eat the fruit." - Dr. Goldman sharing a practical test to distinguish emotional cravings from physical hunger.
  • At 0:22:49 - "Every one of your fat cells is innervated by your nervous system, and your brain is literally speaking to your fat cells, and when you are stressed, your body is in a storage mode, it's not in a metabolic mode, it's like you're just basically trying to survive." - Dr. Hyman explaining the physiological reason why chronic stress resists weight loss.
  • At 0:24:00 - "When you are stressed, emotional, or tired, it is so much harder, it's like your body and your brain have to work on overtime to even get to that point of being able to pause and check in with yourself." - Dr. Goldman describing why self-regulation requires extra grace during difficult life periods.
  • At 0:35:25 - "If it's your only coping mechanism, if it's the only tool in your toolbox, it can be problematic, just like drinking, drugs, all of those other things—like if it is your only coping tool, it's definitely problematic, right, we want to have a toolbox full of tools that we can pull from when we need them." - Dr. Goldman explaining that emotional eating becomes an issue when a person lacks alternative coping strategies.
  • At 0:41:28 - "With orthorexia, the goal is actually not weight loss, it's actually to become healthier, so it's a, you know, a very common goal that a lot of people have, but it's when it becomes obsessive, it becomes a preoccupation, it ends up ruling somebody's life and taking control of their life, is when it becomes problematic." - Dr. Goldman distinguishing orthorexia from anorexia and normal healthy eating.
  • At 0:52:46 - "My definition of food noise is intrusive preoccupation or intrusive thoughts related to food, and the best way to describe it is what I hear from my clients, which is: 'I'm constantly thinking about food, what's the next thing I'm eating, when is the next time I'm eating, what am I eating, did I eat enough?'" - Dr. Goldman defining the mental burden that GLP-1 medications help quiet.

Takeaways

  • Use the "Pause & Post-It" Technique and the Fridge Test: Paraphrasing Viktor Frankl's insight that freedom lies in the pause between stimulus and response, put a Post-it note saying "Stop" or "Pause" on your refrigerator asking: "What's going on right now? How am I feeling? What do I need? Is this going to solve the problem?" Then apply the Fridge Test: if you are opening and closing doors searching for a specific craving, recognize it as an emotional void; if you would gladly eat a bowl of fruit sitting on the shelf, eat because you are physiologically hungry.
  • Practice "Take 5" Diaphragmatic Breathing: To activate the vagus nerve, trigger the parasympathetic relaxation response, and lower physiological arousal so you can respond rather than react (a technique Dr. Goldman teaches clients within their first 2 sessions), take 5 deep diaphragmatic breaths before every meal or during cravings—inhaling for a count of 5, exhaling for a count of 5, and optionally holding for 5 at the bottom.
  • Tweak Rigid Thoughts and Build Action-Based Confidence: Remember that automatic thoughts are temporary and not facts. When you notice an unhelpful thought making you feel bad, either sit with it until it passes or challenge the evidence and "tweak" all-or-nothing thinking into flexible thinking (e.g., shifting from "I don't have an hour for the gym so I won't go" to "I have 20 minutes, and something is better than nothing"), building confidence through small actions rather than waiting to feel confident first.
  • Build an Internal and External Coping Toolbox: Shift from asking "Why me?" to "What is in my control?" and diversify your stress management so food isn't your only coping tool. Stock your toolbox with both external tools (walking, running, stretching) and internal tools you can use anywhere without anyone knowing (breathing exercises, mindfulness, meditation).
  • Pause Weight Loss Goals During Major Life Stress: When going through acute stress, exhaustion, or emotional upheaval, drop weight loss as an active goal since your nervous system is in survival storage mode. Focus instead on maintaining baseline survival habits and changing only one health behavior at a time, starting with sleep.
  • Stop Commenting on Other People's Bodies: Refrain from complimenting or commenting on someone's weight loss unless you know for certain they are trying to lose weight in a healthy way, as comments can unintentionally reinforce disordered eating behaviors or highlight weight loss caused by illness.