Coffee changes gut motility and microbiome

A University of Copenhagen study using an ingestible SmartPill and stool/urine assays found that habitual coffee drinkers had lower small‑intestine pH, greater gut microbial diversity, and more frequent colon contractions even though overall transit time was unchanged. The results are exploratory (small sample) but suggest coffee alters gut physiology as well as microbial ecology. — If replicated, these findings matter for everyday public‑health guidance, could inform non‑drug approaches to stimulate gut motility (constipation treatment), and shape how diet is discussed in gastrointestinal medicine.