Story perspectives

Cambridge study: isosteviol-duloxetine combo slashes gut bacteria growth

7/18/2026

Summary

Story summary

Cambridge researchers found isosteviol with duloxetine sharply reduced growth of two gut bacteria.
The mixture markedly suppressed Roseburia intestinalis and Parabacteroides merdae in lab cultures.
About 75 % of 39 sweeteners altered growth of at least one of 25 bacterial strains.
Over 100 sweetener interactions changed effects, strengthening them in 34 and weakening them in 68.
The isosteviol-duloxetine blend also lowered microbial diversity in the 25-species community, limited to lab conditions.

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Story summary

Cambridge researchers found isosteviol with duloxetine sharply reduced growth of two gut bacteria.
The mixture markedly suppressed Roseburia intestinalis and Parabacteroides merdae in lab cultures.
About 75 % of 39 sweeteners altered growth of at least one of 25 bacterial strains.
Over 100 sweetener interactions changed effects, strengthening them in 34 and weakening them in 68.
The isosteviol-duloxetine blend also lowered microbial diversity in the 25-species community, limited to lab conditions.