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Jump to Key Points Your patient's morning coffee might do more than wake them up — it could also feed beneficial gut bacteria. New research suggests coffee's digestive effects go well beyond caffeine.
A 2024 study published in Nature Microbiology analyzing more than 54,000 stool samples found that coffee drinkers consistently had higher levels of Lawsonibacter asaccharolyticus, a gut bacterium linked to coffee consumption. The finding was replicated across multiple populations and even among people who drank decaffeinated coffee.
Researchers believe compounds such as polyphenols and roasting-derived melanoidins, not caffeine alone, may help shape the gut microbiome. Another 2024 study showed that moderate coffee intake has also been associated with higher levels of Bifidobacterium, lower levels of potentially harmful Enterobacteriaceae, and greater overall microbial diversity.
- Coffee intake linked to ↑ Lawsonibacter asaccharolyticus in stool microbiome.
- Association replicated across populations; seen with decaffeinated coffee too.
- Polyphenols + melanoidins may shape gut microbiome, not caffeine alone.
- Moderate coffee intake associated with ↑ Bifidobacterium, ↓ Enterobacteriaceae, ↑ diversity.
- >5 cups/day linked to GERD, Crohn progression, and excess caffeine constipation.
Coffee's effects may extend beyond digestion. Emerging evidence suggests these microbiome changes could influence the gut-brain axis, affecting gut function, metabolism, and potentially even cognitive health.
But more isn't always better. Drinking more than five cups a day has been linked to increased risk for gastroesophageal reflux disease, progression of Crohn's disease, and excessive caffeine intake has also been associated with chronic constipation.
The takeaway? Coffee recommendations may soon become more personalized. For some patients, it could support gut health. For others, especially those with conditions like irritable bowel syndrome, it may be less well tolerated.
This video is based on a recent Medscape News Global article titled " Coffee and the Gut: What’s Brewing in the Microbiome?" and was created using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication.
