Re:Thinking with Adam GrantCan you trust your gut? with GI doctor Trisha Pasricha | ReThinking
CHAPTERS
- 0:00 – 0:37
Gut feelings are real signals—but don’t label them too fast
Trisha Pasricha explains that “gut feelings” have a genuine physiological basis, but the common mistake is instantly judging the sensation as good or bad. Instead, the sensation should be treated as information that needs interpretation. The guiding idea: your gut is sending a message to slow down, not a prophecy to obey.
- •Gut feelings reflect real body changes, not pure metaphor
- •The danger is quickly assigning moral value (good/bad) to the sensation
- •A gut feeling is a signal that warrants reflection, not immediate action
- •Misinterpretation can flip the meaning of the signal
- 0:37 – 2:37
Digestion begins in the brain: how thoughts rev up your gut
Adam Grant asks where digestion starts, and Trisha reframes it: digestion begins in the brain. Thoughts and emotions can rapidly change gut activity in ways most organs can’t, illustrated by salivation and insulin release when imagining food. Pavlov’s work becomes an entry point to the modern field of neurogastroenterology.
- •The brain can strongly influence gut function in real time
- •Imagining food can trigger salivation and insulin secretion
- •This mind-to-gut pathway is unusually powerful compared with other organs
- •Pavlov’s experiments helped inspire neurogastroenterology
- 2:37 – 5:19
The physiology of a gut feeling: stomach rhythms, stress hormones, and “arrhythmia”
Trisha describes her early research building a stomach-based lie detector and what it revealed about gut rhythms. The stomach has a regular contraction cycle, and stress (including lying) can disrupt it into a chaotic pattern driven by corticotrophin-releasing hormone. This helps explain why gut sensations can precede conscious understanding.
- •Stomach contractions follow a predictable rhythm (~3 cycles/minute)
- •Stress can disrupt that rhythm into a chaotic “arrhythmia” pattern
- •The change starts in the brain and is mediated by stress hormones
- •Gut sensations can be an early warning before conscious reasoning catches up
- 5:19 – 7:35
Decoding the signal: butterflies, novelty, and the “safe can feel boring” trap
They explore how emotional processing (often attributed to the amygdala) can register novelty, not just fear. Trisha uses dating examples to show how people misread “butterflies” as destiny and lack of butterflies as incompatibility. Sometimes the absence of a gut reaction simply reflects safety and comfort rather than lack of chemistry.
- •The amygdala is broader than a fear center—it processes emotion and novelty
- •Butterflies may reflect uncertainty/novelty, not necessarily a good match
- •No butterflies can mean comfort and safety, not “no spark”
- •Context and follow-up matter more than first-moment bodily signals
- 7:35 – 10:18
Why “trust your gut” feels so compelling—and how memory bias fuels it
Adam probes why gut-trusting is seductive, and Trisha points to early bodily learning: kids often locate stress and sickness in the stomach. They add that people remember the times they ignored a warning and got burned more vividly than the times gut feelings misled them. Trauma, especially early trauma, can further rewire how strongly these signals stick.
- •We learn early to associate emotions with stomach sensations
- •The gut’s mystery (and cultural history) amplifies its perceived authority
- •We overweight memorable “ignored my gut and regretted it” episodes
- •Trauma can intensify and entrench threat interpretations
- 10:18 – 13:34
Discomfort isn’t always danger: when intuition helps vs. misleads
They reframe gut discomfort as potentially neutral information—sometimes it’s a sign of growth, not risk. Adam adds research on intuition: it’s more reliable when you have deep experience in a stable, predictable domain. For big, rare life decisions, gut feelings are especially likely to be noisy signals rather than expert pattern recognition.
- •Discomfort can signal novelty and challenge, not a “bad sign”
- •Intuition is most accurate with expertise + predictable environments
- •Many major decisions lack repetition, feedback, and stable patterns
- •Treat gut signals as prompts to pause and investigate biases and context
- 13:34 – 15:29
Lightning round: probiotics skepticism and everyday gut-protective habits
In a rapid-fire segment, Trisha calls out probiotics as overmarketed with murky evidence for many conditions, especially given cost and misplaced focus. Her best advice: treat your gut like you treat your brain—fiber, sleep, exercise, whole foods, and fewer ultra-processed foods. She also shares a major shift in GI practice: taking possible cancer symptoms in younger adults more seriously due to rising early-onset cases.
- •Most probiotics are not routinely recommended; evidence is weaker than marketing suggests
- •Core lifestyle pillars (fiber, sleep, exercise, whole foods) support both brain and gut
- •Ultra-processed foods are a key dietary target to reduce
- •Early-onset colorectal cancer trends are changing how clinicians think about symptoms
- 15:29 – 16:22
GI dinner party picks: Pavlov, flatulence research, and family mentorship
Trisha chooses guests for an ideal gut-themed dinner party: Ivan Pavlov, Dr. Michael Levitt (a pioneer of flatulence research), and her father (also a neurogastroenterologist). The segment highlights how playful questions can coexist with rigorous scientific methods. It also underscores the lineage of ideas connecting behavior, physiology, and GI science.
- •Pavlov’s role in linking conditioned responses to digestion
- •Michael Levitt’s unusual but rigorous flatulence research
- •Scientific curiosity can start with taboo topics and become serious inquiry
- •Mentorship and family influence in shaping a research path
- 16:22 – 20:07
Office hours: helping women be believed about chronic pain in gut-brain disorders
Trisha asks Adam for psychological tools to help women advocate for pain that is often undertreated or dismissed—especially in disorders where tests appear normal. Adam argues the burden should be on medical training and bias reduction, but offers interim tactics: make pain more concrete via comparisons and better-anchored pain scales. They discuss how anchoring pain ratings to relatable experiences can reduce dismissal.
- •Women’s pain is statistically undertreated and doubted across medicine
- •Bias reduction should be a medical-professional responsibility
- •Use concrete comparisons to make subjective pain more legible
- •Anchored pain scales could improve empathy and clinical response
- 20:07 – 22:05
Office hours: changing minds about health misinformation—process over conclusions
Trisha’s second question tackles why misinformation spreads more effectively than facts and how clinicians can respond quickly. Adam recommends avoiding shame, validating the patient’s effort, and turning the encounter into a dialogue about how to judge evidence quality. The goal is to build trust in the clinician’s reasoning process so patients return for help navigating future claims.
- •Debunking in minutes is hard; relationship-building is essential
- •Avoid making patients feel foolish; start with respect and validation
- •Teach how to evaluate study rigor (signal vs. noise)
- •Trust the thought process, not just the doctor’s conclusion
- 22:05 – 24:13
Taboo but practical GI truths: fart odor control and fecal incontinence prevalence
They pivot back to fun but informative GI questions. Trisha explains that most gas is odorless and that bismuth subsalicylate (e.g., Pepto-Bismol) can neutralize sulfur-related odor for high-stakes social moments. She also shares that about 7% of adults experience regular fecal incontinence—common, underdiscussed, and treatable, but often only revealed if clinicians ask directly.
- •Only a small fraction of flatus contains odor-causing sulfur compounds
- •Bismuth subsalicylate can neutralize odor (not necessarily a daily habit)
- •Regular fecal incontinence affects ~7% of adults
- •Patients rarely volunteer it unless asked; treatments often work
- 24:13 – 25:33
Detox and colon cleanses: your liver already does the job
Trisha debunks detox culture and the idea that toxins or old stool are “lurking” and need cleansing rituals. She explains that the liver is the body’s primary filter before substances enter broader circulation. Rather than quick-fix cleanses, she recommends focusing on long-term patterns that stress the liver, like alcohol and ultra-processed foods.
- •Colon cleanses/detox rituals are not medically necessary for “toxins”
- •The liver is the effective built-in detox system
- •Detox culture thrives on fear of chemicals and contamination
- •Long-term habits (alcohol, ultra-processed foods) matter more than cleanses
- 25:33 – 29:17
From plumbing to “second brain”: why poop fascinates and why noticing symptoms matters
Adam explores disgust versus curiosity, and Trisha connects it to health stakes: embarrassment keeps people from noticing stool changes and reporting symptoms, contributing to missed early-onset colorectal cancer signs. She argues the digestive tract isn’t just pipes—it has an enteric nervous system, and the microbiome revolution reshaped how we understand gut function. Seeing the gut as brain-like shifts the reaction from disgust to fascination.
- •Embarrassment prevents symptom reporting and even basic observation
- •Early-onset colorectal cancer concerns raise the importance of awareness
- •The gut contains an enteric nervous system—more than a plumbing system
- •Microbiome research changed the scientific and cultural narrative of the gut
- 29:17 – 36:42
Poophoria: why a good bowel movement brings relief (and how to make it easier)
They discuss “poophoria,” the intense relief/joy some people feel after a bowel movement, especially among patients whose constipation severely impacts quality of life. Trisha attributes it to both psychological relief and physiological relaxation via the vagus nerve, while clarifying that gut-produced dopamine doesn’t cross the blood-brain barrier. She closes with practical tips: adjust posture (knees above waist) to straighten the anorectal angle, and avoid phone distraction that prolongs sitting and may worsen hemorrhoids.
- •Constipation can dominate quality of life; relief can feel euphoric
- •Poophoria combines psychological relief with vagal-mediated relaxation
- •Most dopamine is produced in the gut, but it doesn’t cross into the brain
- •Optimize toileting posture (knees above waist) to ease passage
- •Avoid smartphone time on the toilet to reduce prolonged sitting/hemorrhoid risk
