The Study
An oral microbiome model for predicting atherosclerotic cardiovascular disease
This study looked at people's mouth bacteria and saw that those who later had heart problems tended to have different bacteria than those who didn't. But it didn't change anyone's mouth bacteria to see if that caused heart problems — so we can't say the bacteria caused the heart issues, just that they were linked.
Analysis score
Maximum 72 for a cohort study.
Where the score came from
Scientists found that the types of bacteria in your mouth are linked to your risk of having a heart attack or stroke in the next few years — especially if you're between 50 and 70.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 562 / 100
Quality score
Groups of people are followed over time to see who develops an outcome. Strong for identifying risk factors and associations, but cannot prove causation as firmly as RCTs.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — this means doctors could one day use a simple mouth swab to better identify who’s truly at high risk for heart disease, even if their cholesterol and blood pressure look okay.
- 2People with more Fusobacterium, Prevotella, or Leptotrichia in their mouth had higher heart risk.
- 3People with more Streptococcus or Actinomyces had lower risk.
- 4A model using mouth bacteria + age/smoking/LDL cholesterol predicted heart events with 84.5% accuracy (AUC), better than using age/smoking/LDL alone (69.3%).
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Frontiers in Cellular and Infection Microbiology
Year
2026
Authors
Q. Sui, Jie Yu, S. Cui
Related Content
Claims (6)
In adults aged 50–70 without prior heart disease, higher levels of certain oral bacteria—Fusobacterium nucleatum, Prevotella, Porphyromonas, and Leptotrichia—are linked to a higher incidence of heart attacks, strokes, or cardiovascular death, while higher levels of Streptococcus and Actinomyces are linked to a lower incidence of these events.
In middle-aged adults, older age is the most important factor for predicting serious heart and blood vessel problems, even when considering bacteria in the mouth.
Including oral microbiome data with standard risk factors like age, cholesterol, and smoking status improves the accuracy of predicting heart attacks and other major heart events in middle-aged adults.
A machine learning model using oral bacteria data and health information correctly predicted serious heart problems in middle-aged adults 84.5% of the time, which was better than standard medical models that predicted correctly 69.3% of the time.
Middle-aged adults with higher levels of Streptococcus and Actinomyces in their mouth microbiome have a lower incidence of major cardiovascular events such as heart attacks and strokes.
The types and amounts of bacteria in the mouth are linked to the likelihood of developing cardiovascular disease.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.