Summary of How to poop better, according to a gastroenterologist

Overview of How to poop better, according to a gastroenterologist

This Science Friday episode (host Flora Lichtman) features Dr. Trisha Pasricha, a neurogastroenterologist at Harvard and author of You've Been Pooping All Wrong. The conversation demystifies bowel habits, explains common mistakes, offers practical, science-backed tips to improve bowel movements and gut health, and highlights important warning signs that deserve medical attention. It also touches on the gut–brain axis and emerging research (including links between early GI symptoms and Parkinson’s disease) and rising rates of early-onset colorectal cancer.

Key takeaways

• Many people never learned the correct mechanics of pooping after childhood potty training; modern habits have made things worse.
• Small, everyday changes (posture, phone use, fiber intake, movement after meals) can meaningfully improve bowel function and reduce problems like hemorrhoids, bloating, and constipation.
• Certain stool colors are red flags (white/clay, black tarry, bright red/maroon — with some exceptions like beets or barium).
• The gut communicates with the brain (via the vagus nerve); for some diseases (e.g., Parkinson’s) GI symptoms can appear years before neurological signs.
• Talk to your clinician early about GI symptoms — many people avoid doing so out of embarrassment.

Practical tips to poop better

• Avoid smartphones in the bathroom

  • Dr. Pasricha’s lab found people who bring phones into the bathroom had a 46% greater risk of hemorrhoids; phone users were far more likely to sit >5 minutes scrolling.
  • Long sitting on the toilet can change pelvic-floor dynamics and promote engorgement of hemorrhoidal cushions.

• Use a footstool (mimic squatting)

  • Sitting upright on a 90° toilet kinks the rectum via the puborectalis muscle; raising knees (with a stool or box) simulates squatting and straightens the rectal tube, easing passage.

• Eat more fiber

  • Fiber reaches the colon where bacteria ferment it into beneficial compounds (anti-inflammatory effects). Most Americans fall far short of fiber goals.
  • Ultra-processed diets are low in fiber and contain additives that may harm gut lining.

• Move after meals

  • A short brisk “passeggiata” (5–10 minutes walk) after eating helps gas and gut contents move along and reduces bloating.
  • If you can’t walk, sitting upright (not lying down) improves gas movement by ~33% versus lying down.

• Manage bloating: get up and walk; sit up straight; avoid lying down right after meals.

Warning signs (when to seek care, including emergencies)

• White or pale/clay-colored stool: emergency — suggests loss of bile pigment (bilirubin) due to obstruction (gallstone, tumor, etc.). Exception: recent barium study will also turn stool white.
• Black, tarry stool: concerning for upper GI bleeding (blood altered by stomach acid).
• Bright red or maroon blood in stool: always concerning — though recent beet consumption can mimic blood (ask about diet).
• New, persistent changes in bowel habits or rectal bleeding — get evaluated (younger people can still have serious disease).
• If in doubt or if symptoms are new/persistent, seek medical attention rather than delaying out of embarrassment.

Common questions answered

• Why does spicy food “burn” at the end?
  • Capsaicin activates TRPV1 receptors in the GI tract, increasing motility and pain signaling; this can cause fiery diarrhea and pain felt most in mouth and at the exit.
• Can stool color be influenced by food/contrast agents?
  • Yes — beets can color stool red; barium (from imaging) can make stool white.

Gut–brain axis and research frontiers

• The vagus nerve: about 90% of signaling on the vagus is gut → brain, not only brain → gut.
• Parkinson’s disease
  • Many Parkinson’s patients have GI symptoms (constipation, swallowing issues) years to decades before motor signs.
  • Misfolded alpha-synuclein is found in guts of Parkinson’s patients; the hypothesis is that misfolding can start in the gut and travel up the vagus nerve to the brain.
  • This opens the possibility (future) of earlier diagnosis or preventive interventions, though clinical applications are years away.

Colorectal cancer — current practice points

• Rates of colorectal cancer have risen in adults under 50; screening age for average-risk individuals is now 45.
• Young people and clinicians may delay evaluation for bleeding or new bowel changes; be proactive.
• Know your family history in detail (what type of cancer, at what age) — family history may warrant earlier screening.
• Insurance covers diagnostic evaluation for symptoms in younger adults, but routine screening under 45 is not routinely covered.

Data & notable figures mentioned

• Phone-in-bathroom users: 46% higher hemorrhoid risk (study from Pasricha’s lab).
• 95% of Americans are not meeting fiber goals.
• ~60% of foods consumed in the U.S. are ultra-processed (low in fiber).
• ~80% of people with Parkinson’s have GI issues that often predate motor symptoms.
• About 1 in 3 people with GI symptoms avoid talking to a doctor because of embarrassment.

Notable quotes

• “You cannot shock me.” — reassurance from Dr. Pasricha: clinicians are used to hearing what patients find embarrassing.
• “Brown comes from bilirubin” — brown color of stool is from bile pigment; pale stool can indicate bile obstruction.
• “We’ve been pooping all wrong.” — title and central premise: many common habits run counter to the biology of defecation.

Action items (quick checklist)

• Stop taking your phone into the bathroom.
• Use a small stool or elevate your feet to mimic squatting when you poop.
• Increase dietary fiber (fruits, vegetables, whole grains, legumes); reduce ultra-processed foods and sugary drinks.
• Take a short walk after meals; sit up rather than lie down.
• Track and know your family cancer history; get screened at recommended ages (45+ for average risk).
• If you notice pale/white stool, black tarry stool, new bleeding, or persistent change in bowel habits, see a clinician promptly — don’t wait out of embarrassment.

This summary captures the practical advice, warning signs, and research highlights Dr. Trisha Pasricha shared on Science Friday about improving bowel habits and caring for gut health.