The surprisingly big impact the small intestine has on your health

image via New Scientist

June 17, 2025, 4:00 PM

• •The small intestine plays crucial roles beyond processing food, including regulating metabolism and maintaining a healthy gut microbiome.
• •New research highlights the small intestine's 24-hour cycle, with overnight chyme pooling and microbial activity affecting fiber digestion and the production of SCFAs.
• •The small intestine influences metabolism through glucose flux and the release of appetite-suppressing hormones, opening doors for new therapies.

The small intestine, long a mystery, is now revealing its crucial roles in appetite, metabolism, and the microbiome, challenging previous understanding. Research using new techniques shows the small intestine's dynamic functions, including its 24-hour cycle affecting fiber digestion. The jejunum has been found to transport glucose, which may be beneficial for the gut microbiome. Discoveries about the small intestine open opportunities for better understanding and therapies related to health.

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