University of Tartu Finds 78 Drugs Leave Gut Microbiome Traces for 3 Years
Updated
Updated · SciTechDaily · May 24
University of Tartu Finds 78 Drugs Leave Gut Microbiome Traces for 3 Years
1 articles · Updated · SciTechDaily · May 24
Stool samples from 2,509 Estonian Biobank participants showed 78 of 186 studied medications left gut-microbiome signatures that remained detectable years after treatment ended, in some cases for more than three years.
The analysis found 167 drugs were linked to microbiome differences overall, challenging the common practice of considering only current medications in microbiome research.
Benzodiazepines stood out: their effect on the overall gut microbiome was comparable to broad-spectrum antibiotics, and stronger signals often appeared with repeated use over the previous five years.
A follow-up group of 328 participants sampled again after a median 4.4 years showed predictable microbiome shifts after starting or stopping some drugs, including proton pump inhibitors, SSRIs and certain antibiotics.
The researchers said medication history should be factored into microbiome studies, while noting the work tracked prescription purchases rather than confirmed use and excluded over-the-counter drugs.
Are common drugs like antidepressants leaving a permanent, antibiotic-like mark on your gut health?
Could a 'microbiome scar' from past prescriptions predict your future risk for chronic diseases?
The Long Shadow of Medications: Persistent Effects on Gut Microbiome Composition and Health
Overview
Groundbreaking research from the University of Tartu has revealed that medications taken years ago can have a lasting impact on the human gut microbiome. This discovery shows that the effects of certain drugs are not short-lived but can persist for extended periods, continuing to influence the composition and function of gut bacteria long after use. As a result, past medication use acts as a hidden confounder, fundamentally changing how scientists understand and study the gut microbiome. This finding highlights the need to consider a person’s full medication history when researching or treating gut health.