GPR109A Activation and Immune Effects

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Topic Today:

Ketones, particularly BHB, aren’t just backup fuel—they’re powerful signals that affect inflammation, gene expression, and mitochondrial function. This episode shows how BHB acts like a hormone to enhance metabolic health and cellular resilience.

Summary:

In this episode of the Metabolic Classroom, Dr. Bikman explores the remarkable role of beta-hydroxybutyrate (BHB), the most abundant ketone body, as both a metabolic fuel and a cellular signaling molecule. While traditionally seen as mere backup energy, BHB is now recognized as a potent agent that influences gene expression, reduces inflammation, and protects mitochondrial function.

Ben unpacks the dual nature of BHB, describing how it activates specific receptors like GPR109A and FFAR3, modulates immune responses, and directly inhibits the NLRP3 inflammasome, a key player in chronic inflammation. He also highlights how BHB affects epigenetic regulation through HDAC inhibition, enhancing cellular resilience and antioxidant defenses.

The lecture concludes by tying these pathways together to show how ketones—whether produced endogenously or taken as supplements—convey a coordinated biological signal of adaptation and protection. This shift in understanding elevates ketones from mere “backup fuel” to central players in metabolic health.

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.

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

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