India, Nov. 9 -- Scientists may have underestimated the role of the trillions of bacteria in our intestines in heart disease. People with clogged arteries have different gut microorganisms than people with healthy hearts, according to research published in mSystems on November 6, 2025.

Researchers from Sungkyunkwan University in South Korea examined gut bacteria samples from 28 healthy adults and 14 patients with coronary artery disease. They went deeper by examining the genes these germs carry and what those genes actually accomplish, rather than only counting the number of bacteria that were there.

The amount of good bacteria in the guts of those with coronary artery disease was much lower. Slackia isoflavoniconvertens and Faecalibact...