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Bile Acids and the Gallbladder
Bile is the detergent your liver makes to digest fat, and the gallbladder is the little sack that stores it. Most people can ignore all of this until a stone forces surgery. Here's the part almost nobody gets told: after the gallbladder comes out, one in twenty to one in ten people run to the bathroom for years, and a cheap powder fixes it in under a week. The same powder fixes roughly one in three people stuck under an IBS label that never fit.
Know Evidence Moderate Chapter Gut

The gallbladder times the release. The liver makes bile all day out of cholesterol. Between meals it backs up into the gallbladder, concentrating five to ten fold; when fat arrives the sack squeezes and delivers a pulse right when it's needed 1. Take the sack out and the timing goes: bile drips into an empty gut, spills into the colon, and the colon answers by dumping water. That's the diarrhoea.

The numbers most people never hear. Around 700,000 gallbladders come out in the US each year 2. Five to twelve percent of those patients get stuck with urgent, post-meal loose stools for years afterward 3 4. The same bile-into-the-colon problem shows up in people who still have a gallbladder: about one in three patients carrying a diarrhoea-type IBS diagnosis actually have bile-acid diarrhoea, a different condition with a specific fix 5 6.

It runs the whole day. Three to ten urgent stools a day reshapes everything: meals become calculations, travel narrows to places with trusted bathrooms, nights stop being uninterrupted. Quality-of-life scores land near inflammatory bowel disease, and the average wait for a correct diagnosis is about five years, because it's written off as IBS you'll just have to live with 6.

If this is you, the fix is a bile binder. These drugs sit in the gut and grab bile salts before the colon can react. Old, cheap, fast.

How fast it turns around.

  • First week: stools firm, the after-meal dash goes quiet, nights stop including bathroom trips.
  • First month: you start saying yes again to restaurants, road trips, and meetings without scouting the exits.
  • Between 70 and 96 percent of bile-acid-diarrhoea patients respond this way 6 7. Stop the powder and it comes back in days; restart, it stops again.
The fine print β€” when to skip it, and what people get wrong

Sequestrants constipate, which doubles as a titration signal. Long-term high doses can blunt fat-soluble vitamins A, D, E, K; check vitamin K before surgery or pregnancy. Space thyroid hormone, warfarin, statins, digoxin, and contraceptives away from the dose, and recheck thyroid and INR labs after starting 7.

  • "Low-fat diet forever after gallbladder removal." Almost nobody needs it; the loose minority does better on a binder than on fat restriction 4.
  • "IBS-D is the diagnosis." For about one in three, the real answer is bile-acid diarrhoea, with a cheap specific fix 5.
  • "Bile just digests fat." It's also a hormone, signalling to liver, gut, and brown fat about sugar and energy 8.

The clean scan (SeHCAT) isn't available in the US, so a two-week powder trial is the practical test, yet primary care rarely reaches for it. Cholestyramine's grit makes people quit, logged as "didn't work." Ask plainly: "Could this be bile-acid diarrhoea? Can we trial cholestyramine or colesevelam?" 6

References
  1. 1Hofmann AF (2009). The enterohepatic circulation of bile acids in mammals: form and functions. Frontiers in Bioscience. link
  2. 2EASL (2016). EASL Clinical Practice Guidelines on the prevention, diagnosis and treatment of gallstones. Journal of Hepatology. link
  3. 3Sauter GH, Moussavian AC, Meyer G, Steitz HO, Parhofer KG, JΓΌngst D (2002). Bowel habits and bile acid malabsorption in the months after cholecystectomy. American Journal of Gastroenterology. link
  4. 4Fisher M, Spilias DC, Tong LK (2008). Diarrhoea after laparoscopic cholecystectomy: incidence and main determinants. ANZ Journal of Surgery. link
  5. 5Pattni S, Walters JR (2009). Recent advances in the understanding of bile acid malabsorption. British Medical Bulletin. link
  6. 6Camilleri M (2015). Bile acid diarrhea: prevalence, pathogenesis, and therapy. Gut and Liver. link
  7. 7Walters JR, Pattni SS (2010). Managing bile acid diarrhoea. Therapeutic Advances in Gastroenterology. link
  8. 8de Aguiar Vallim TQ, Tarling EJ, Edwards PA (2013). Pleiotropic roles of bile acids in metabolism. Cell Metabolism. link
Related in the handbook (3)
Related
  • β€” Loose, urgent stools (Bristol 6-7) after gallbladder removal are the classic bile-acid pattern.
  • β€” Bile acid diarrhoea is one of the big hidden causes β€” and it resolves in days once you bind the bile.
  • β€” A lot of people stuck under an IBS label actually have bile acid diarrhoea β€” and a cheap powder fixes it.
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