Huberman LabThe Science of Your Gut Sense & the Gut-Brain Axis | Dr. Diego Bohórquez
At a glance
WHAT IT’S REALLY ABOUT
Your Gut’s Hidden Senses Quietly Shape Cravings, Mood, And Decisions
- Neurobiologist Dr. Diego Bohórquez explains how specialized gut cells called neuropods act like taste buds inside the intestine, rapidly sensing nutrients and sending millisecond-fast electrical signals to the brain via the vagus nerve. This gut-brain communication goes far beyond hormones and the microbiome, directly influencing cravings, food preferences, mood, and even how safe or uneasy we feel. Bohórquez describes how gut sensing can override taste, explains why surgeries like gastric bypass radically change food choices and addiction risk, and outlines how the gut evaluates proteins, sugars, fats, and fibers to guide behavior. The conversation weaves in his upbringing in the Amazon, plant wisdom, ritual uses of botanicals like guayusa, and the emerging view of gut sense as a genuine “sixth sense” that can be trained to better navigate life decisions.
IDEAS WORTH REMEMBERING
5 ideasYour gut contains true sensory cells that act like internal taste receptors and synapse directly onto the brain.
Enteroendocrine cells in the intestinal lining, once thought to only release slow-acting hormones, include a subset with long ‘arms’ called neuropods that form synapses with vagal sensory neurons. Using modified rabies virus tracing, Bohórquez’s lab showed that these cells connect the intestinal lumen to brainstem nuclei via essentially one synapse, allowing the brain to detect what’s in your gut in milliseconds, not just through slow hormonal drift in the bloodstream.
Gut sensing can determine your preference for sugar over sweeteners, independent of taste on the tongue.
In mice given a choice between non-caloric sweetener and real sugar, they quickly learn to prefer sugar even when tongue sweet receptors are genetically removed. When Bohórquez’s team used optogenetics to silence neuropod cells in the proximal intestine, the animals could no longer distinguish sugar from sweetener and lost their strong sugar preference. Conversely, activating these cells made mice drink plain water or sweetener as if it were caloric sugar, showing the gut’s nutrient sense can override or mimic taste to drive craving.
The gut integrates multiple layers of information about food—chemistry, absorption, and metabolism—and converts it into precise electrical and hormonal messages.
For a single nutrient like glucose, neuropod cells: (1) detect sweetness via TAS1R receptors, (2) import glucose through sodium-glucose transporters that depolarize the cell, and (3) metabolize glucose to ATP, further depolarizing the cell and triggering staged release of glutamate and then peptides. Fast neurotransmission via glutamate drives immediate vagal signaling and behavior (e.g., choosing sugar), while slower hormone release (e.g., GLP‑1) shapes satiety and longer-term appetite patterns.
Protein sensing in the gut strongly shapes appetite, overeating risk, and the viability of plant-based diets.
Emerging data (from others’ unpublished and published work) show that when protein is absent, animals reduce intake of that food unless it is very high in fermentable fiber that lets microbes synthesize essential amino acids. When protein is low but not absent, animals often overeat to compensate, especially if the diet is rich in palatable sugars and fats. This supports the “protein leverage hypothesis” and offers a mechanistic reason why high-fiber plant-based diets can sometimes satisfy protein needs, while low-protein, ultra-processed diets can drive overeating.
Rewiring the gut through bariatric surgery can completely reorder cravings, resolve diabetes rapidly, and increase addiction risk.
Bohórquez describes a woman who, after Roux-en-Y gastric bypass, lost ~40% of her body weight and saw her diabetes vanish within a week—but her disgust for egg yolks flipped to a craving so strong she wiped plates clean with toast. Bariatric procedures shorten or rearrange gut segments, rapidly altering hormone release and the sensory environment for neuropod cells. Clinically, post-surgery patients frequently shift food preferences and have a 2–7x increased risk of alcoholism, suggesting that altered gut sensing changes how reward circuitry in the brain responds to nutrients and drugs.
WORDS WORTH SAVING
5 quotesWhen we swallow something, literally we have to trust our gut.
— Dr. Diego Bohórquez
Some of these cells had a very peculiar anatomy… like in the Sistine Chapel, Adam reaching out to God.
— Dr. Diego Bohórquez
The short answer is that, in due time, we are gonna realize that they detect just about every single thing that we put in our mouths every day.
— Dr. Diego Bohórquez
If we are what we eat, the place where food becomes us and we become food should be the intestine.
— Dr. Diego Bohórquez (paraphrasing a philosopher)
If you go to a nice restaurant and you have a nice meal while you're having a nice conversation… it brings humility to your body to know how much your body is doing for you.
— Dr. Diego Bohórquez
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