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The gut contains receptors that respond to food components like amino acids, fats, sugars, and nutrients, as well as temperature and acidity. Sensing in the gut occurs at the level of specific neurons and neural circuits. This communication below conscious detection drives patterns of thinking, emotion, and behavior.
Gut sensing affects food preferences and cravings. Alterations to gut anatomy, like gastric bypass surgery, can significantly change taste preferences. For example, a person's post-surgery craving for egg yolks shifted dramatically, reflecting how gut changes can impact food desires.
Optogenetics has revealed that gut neuropod cells influence behavior related to food choices. When these cells are manipulated to sense or block sugar detection, animals show altered preferences for sugars or sweeteners, indicating a direct connection between gut sensing and food cravings.
Gut sensing affects food perception by not only detecting nutrients but also influencing saliency and valence of food stimuli. Activation of gut cells can make non-caloric sweeteners or even plain water more appetizing, highlighting the complex interplay between gut sensing, brain responses, and food behaviours.
The podcast delves into the intricate connections of the gut-brain axis, highlighting the role of sensory cells in detecting various chemicals in food. The sensory cells send signals to the brain, influencing appetite, feelings of well-being, and decision-making processes related to food choices. These signals impact behaviors such as cravings, aversions, and specific food preferences driven by chemical stimuli detected in different regions from the mouth to the rectum.
Gastric bypass surgery increases sensitivity in the intestine, altering responses to food stimuli. Patients post-surgery may experience changes like increased sensitivity, attraction, or repulsion to certain foods due to altered communication between the intestine and the brain. Notably, patients undergoing gastric bypass have shown an increased likelihood of developing alcoholism, possibly due to heightened sensitivity and attraction to specific stimuli.
Discussions touch upon GLP1 analogs' effects in reducing hunger by acting on the hypothalamus and gut, potentially influencing neuropod cells involved in food cravings and aversions. Studies suggest GLP1's localized action may impact nerve fibers, triggering behaviors and appetite reduction. The podcast hints at complementary interactions and studies indicating GLP1's potential role in regulating essential behavior and neurological responses to food stimuli.
The episode delves into the wisdom embedded in plants, suggesting that they possess vital knowledge shaped by evolutionary experiences. Traditional plant-based medicines are recognized for their rich nutritional profiles and therapeutic effects. The discussion extends to plant intelligence influencing food choices, flavor preferences, and health outcomes, emphasizing the profound historical connection between humans and plant-based sources of nutrition and wellness.
The podcast discusses how the gut-brain connection plays a crucial role in synchronizing the body's electrical waves for optimal functionality. It delves into the concept that the gut, where food is absorbed, influences the body's overall electricity, affecting hunger cues and interactions between the digestive tract and nervous system. The discussion highlights how the vagus nerve facilitates bidirectional communication between the brain and the body, showing that gut intuition can impact judgments and relationships based on subconscious signals.
The episode explores how food consumption fosters social bonding and communication among individuals. It mentions studies indicating that sharing similar food preferences enhances connection between people, promoting feelings of understanding and common experience. The discussion touches on the psychological and physiological aspects of sharing meals, emphasizing how chemical constituents of food influence shared experiences and communal connections, particularly observed in rituals like sharing a meal. Furthermore, it delves into the potential role of food, alongside basic functions like sleep and sex, in fostering feelings of safety, bonding, and decision-making both in personal and professional contexts.
In this episode, my guest is Dr. Diego Bohórquez, PhD, professor of medicine and neurobiology at Duke University and a pioneering researcher into how we use our ‘gut sense.’ He describes how your gut communicates to your brain and the rest of your body through hormones and neural connections to shape your thoughts, emotions, and behaviors. He explains how your gut senses a range of features such as temperature, pH, the macro- and micronutrients in our foods, and much more and signals that information to the brain to affect our food preferences, aversions, and cravings.
Dr. Bohórquez describes his early life in the Amazon jungle and how exposure to traditional agriculture inspired his unique expertise combining nutrition, gastrointestinal physiology, and neuroscience. We discuss how the gut and brain integrate sensory cues, leading to our intuitive “gut sense” about food, people, and situations. This episode provides a scientific perspective into your gut sense to help you make better food choices and, indeed, to support better decision-making in all of life.
For show notes, including referenced articles and additional resources, please visit hubermanlab.com.
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00:00:00 Dr. Diego Bohórquez
00:02:37 Sponsors: Joovv, LMNT & Helix Sleep; YouTube, Spotify & Apple Subscribe
00:06:49 Gut-Brain Axis
00:11:35 Gut Sensing, Hormones
00:15:26 Green Fluorescent Protein; Neuropod Cells & Environment Sensing
00:26:57 Brain & Gut Connection, Experimental Tools & Rabies Virus
00:35:28 Sponsor: AG1
00:37:00 Neuropod Cells & Nutrient Sensing
00:43:55 Gastric Bypass Surgery, Cravings & Food Choice
00:51:14 Optogenetics; Sugar Preference & Neuropod Cells
01:00:29 Gut-Brain Disorders, Irritable Bowel Syndrome
01:03:03 Sponsor: InsideTracker
01:04:04 Gut & Behavior; Gastric Bypass, Cravings & Alcohol
01:07:38 GLP-1, Ozempic, Neuropod Cells
01:11:46 Food Preference & Gut-Brain Axis, Protein
01:21:35 Protein & Sugar, Agriculture & ‘Three Sisters’
01:25:16 Childhood, Military School; Academics, Nutrition & Nervous System
01:36:15 Plant Wisdom, Agriculture, Indigenous People
01:41:48 Evolution of Food Choices; Learning from Plants
01:48:15 Plant-Based Medicines; Amazonia, Guayusa Ritual & Chonta Palm
01:56:58 Yerba Mate, Chocolate, Guayusa
02:00:22 Brain, Gut & Sensory Integration; Variability
02:06:01 Electrical Patterns in Gut & Brain, “Hangry”
02:12:43 Gut Intuition, Food & Bonding; Subconscious & Superstition
02:22:00 Vagus Nerve & Learning, Humming
02:26:46 Digestive System & Memory; Body Sensing
02:32:51 Listening to the Body, Meditation
02:40:12 Zero-Cost Support, Spotify & Apple Reviews, YouTube Feedback, Sponsors, Social Media, Neural Network Newsletter
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