A recent study published in npj Biofilms and Microbiomes reports on Mar. 9 that certain gut microbes are linked to the future risk of cardiometabolic diseases, including heart disease, diabetes, and hypertension. The research followed nearly 4,800 adults over more than six years as part of the Healthy Life in an Urban Setting (HELIUS) cohort.
The findings matter because they suggest that the composition of a person's gut microbiome could serve as an early indicator for developing cardiovascular and metabolic conditions. This could help identify individuals at higher risk before symptoms appear, potentially guiding preventive strategies focused on diet or microbiome interventions.
Researchers analyzed fecal samples from participants using advanced genetic sequencing techniques to characterize their gut bacteria. They also measured blood metabolites in a subgroup to explore how microbial activity might influence health outcomes. Over the follow-up period, hundreds of new cases of hypertension, dyslipidemia, and diabetes were recorded. Major adverse cardiovascular events (MACE), such as arrhythmia and heart failure, were tracked through hospital records.
The study found that increased levels of certain bacteria—such as Akkermansia muciniphila and Lachnospiraceae taxa—were associated with lower risks for major cardiovascular events. In contrast, other species like Ruminococcus gnavus group were linked to higher risks for expanded cardiovascular outcomes. However, after adjusting for factors like age, sex, body mass index, alcohol use, and smoking status, only Eubacterium xylanophilum group species remained significantly protective.
Metabolomic analysis showed that harmful microbes tended to be associated with bile acids and acylcarnitine-related compounds in the blood. Protective microbes correlated with plant-derived metabolites such as 3-phenylpropionate and enterolactone sulfate—suggesting a possible link between plant-based diets and reduced cardiovascular risk through their effect on the microbiome.
While these results highlight promising connections between diet, gut bacteria, and long-term heart health, researchers caution that more work is needed before clinical recommendations can be made. Future studies should include repeated sampling over time and larger datasets to confirm these associations.
