The Metabolic Classroom with Dr. Ben Bikman

How Bile Controls Insulin, GLP-1, and Fat Burning

32 snips

Feb 23, 2026

They explore how bile acids act like hormones to control liver fat, glucose production, and insulin sensitivity. Discussion covers enterohepatic recycling and two key receptors, FXR and TGR5, that affect energy expenditure, GLP-1 release, and inflammation. They also examine impacts of gallbladder removal and compare bile supplements such as ox bile and TUDCA.

Ask episode

AI Snips

Chapters

Transcript

Episode notes

INSIGHT

Bile Acids Act As Hormonal Metabolic Signals

Bile acids are hormones that signal metabolism beyond fat digestion.
They derive from cholesterol, are concentrated in the gallbladder, and recycle 6–12 times daily via enterohepatic circulation.

INSIGHT

FXR Receptor Lowers Liver Fat And Glucose Output

FXR activation reduces liver fat and hepatic glucose output while improving insulin signaling.
Intestinal FXR induces FGF19 which feeds back to the liver to suppress glucose and bile acid production.

INSIGHT

TGR5 Boosts Thermogenesis And Endogenous GLP-1

TGR5 activation raises energy expenditure and stimulates GLP-1 release from intestinal L cells.
TGR5 induces type 2 deiodinase to convert T4 to active T3 locally, increasing mitochondrial thermogenesis in brown fat and muscle.

Get the Snipd Podcast app to discover more snips from this episode

Get the app

📢 Ask Dr. Bikman’s Digital Mind (multilingual):

https://benbikman.com/ben-bikmans-digital-ai-mind

📢 Dr. Bikman’s Community & Coaching Site: https://insuliniq.com

Topic:

Bile acids are powerful hormone-like signaling molecules that regulate liver fat, glucose production, insulin sensitivity, energy expenditure, inflammation, and GLP-1 release through FXR and TGR5 receptors. Gallbladder function and bile acid signaling play a far greater role in metabolic health than most people realize.

Summary:

Ben explores a largely overlooked metabolic regulator: bile acids. While bile is commonly understood as a digestive fluid that helps emulsify fats, bile acids are now recognized as powerful hormone-like signaling molecules that influence insulin sensitivity, mitochondrial function, thyroid hormone activation, inflammation, GLP-1 release, and fat cell behavior.

Dr. Bikman explains the remarkable efficiency of enterohepatic circulation, where bile acids are reabsorbed and recycled multiple times per day. This recycling process allows bile acids to interact with key receptors — FXR (a nuclear receptor) and TGR5 (a G-protein coupled receptor) — triggering metabolic effects throughout the body.

Activation of FXR reduces liver fat production, improves hepatic insulin sensitivity, lowers glucose output, and stimulates FGF19, which further suppresses excess glucose production. TGR5 activation increases energy expenditure via thyroid hormone activation in brown fat and muscle, stimulates GLP-1 release in the intestine, reduces inflammation in immune cells, and supports healthier adipose tissue signaling.

Ben also examines the metabolic consequences of gallbladder removal. Without the gallbladder’s concentrated, timed bile release, signaling patterns change, and epidemiological data suggest increased risk of metabolic syndrome and fatty liver. Finally, Dr. Bikman discusses bile supplements such as ox bile and TUDCA, reviewing mechanistic rationale and human data showing improved insulin sensitivity in certain contexts.

The overarching message: bile acids are not merely digestive detergents — they are among the most important and underappreciated metabolic signaling molecules in the body.

References:

For complete show notes and references, we invite you to become an Insider subscriber. You’ll enjoy real-time, livestream Metabolic Classroom access which includes live Q&A with Ben after the lecture, unlimited access to Dr. Bikman’s Digital Mind, ad-free podcast episodes, show notes and references, and Ben’s Weekly Research Review Podcast. Learn more: https://www.benbikman.com

NOTE: The information presented is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Dr. Bikman is not a clinician—and, he is not your doctor. Always seek the advice of your own qualified health providers with questions you may have regarding medical conditions.

#BileAcids #MetabolicHealth #FXR #TGR5 #Gallbladder #Cholecystectomy #InsulinResistance #GLP1 #TUDCA #OxBile #FatDigestion #Mitochondria #EnergyExpenditure #LiverHealth #FattyLiver #Type2Diabetes #MetabolismScience #HormoneHealth #BrownFat #DrBenBikman

Ben’s favorite yerba mate and fiber: https://ufeelgreat.com/usa/en/c/1BA884

Exogenous ketones: A high-quality option is the NSF-certified goBHB from Clean Form Nutrition, where you can use the code BEN10 for a 10% discount: https://cleanformnutrition.com/products/go-bhb

Hosted on Acast. See acast.com/privacy for more information.