Drinking This Daily Can Increase 115 Types Of Good Gut Bacteria, Study Shows

Why It Matters

The findings position coffee as a low‑cost, widely accessible tool for enhancing gut health, a key driver of overall disease risk and longevity. This could reshape dietary guidelines and spur functional‑food innovations targeting the microbiome.

Key Takeaways

• Coffee boosts 115 gut bacterial species.
• High coffee intake raises L. asaccharolyticus eightfold.
• Polyphenols, not caffeine, drive microbiome changes.
• Decaf coffee shows similar bacterial benefits.
• Optimal polyphenol extraction depends on roast and brew.

Pulse Analysis

The gut microbiome has emerged as a central pillar of metabolic health, influencing everything from immune function to mental well‑being. Among dietary factors, polyphenol‑rich foods are recognized for their prebiotic potential, yet coffee—one of the world’s most consumed beverages—has received comparatively little attention until now. A new analysis combining dietary surveys from nearly 23,000 participants with over 54,000 stool‑sample genomes represents the largest effort to map coffee’s impact on microbial diversity. Moreover, the cross‑regional nature of the stool data strengthens the generalizability of the results across diverse diets.

The researchers stratified participants into never, moderate and high coffee consumers and applied machine‑learning models to link intake levels with bacterial abundance. Results revealed that coffee stimulates the growth of 115 distinct gut taxa, with the species Lachnospiraceae asaccharolyticus increasing up to eight‑fold in high consumers. Importantly, both caffeinated and decaffeinated brews produced comparable shifts, confirming that polyphenols—not caffeine—are the active agents, and they also generated beneficial metabolites such as quinic acid and hippurate. The study also identified correlations between higher bacterial diversity and lower systemic inflammation markers, hinting at broader health benefits.

For consumers, the findings suggest that a daily habit of three to five cups of coffee can serve as a simple, cost‑effective strategy to enrich beneficial microbes and support metabolic resilience. To maximize polyphenol intake, experts recommend selecting lightly roasted beans, storing them in airtight containers, and using brewing methods that preserve antioxidant compounds, such as pour‑over or French press. As the evidence base expands, food‑service brands and supplement developers are likely to leverage coffee‑derived polyphenols in functional products aimed at gut health, opening new market opportunities. Clinicians may soon incorporate coffee consumption metrics into personalized nutrition plans, while insurers could consider microbiome‑friendly lifestyle incentives.