The trillions of microorganisms living in our gut are closely connected with our health.
The gut microbiome interacts with the immune system, influences metabolism and is associated with many aspects of cardiovascular and metabolic health.
But could the microbiome also tell us something about our health years into the future?
Recent research suggests that it might.
Different microbiome patterns are associated with different health profiles
There is no single “normal” gut microbiome.
The types of bacteria living in the gut and their relative abundance vary considerably from person to person.
Researchers have found that some microbiome patterns are associated with higher levels of inflammation and less favorable metabolic health, while others are associated with lower inflammation and healthier profiles.
A large 2026 study went one step further.
Instead of looking only at people’s health at the time their microbiome was measured, researchers followed participants through national health records for up to nine years.
This allowed them to ask whether different microbiome patterns were also associated with future disease.
Some microbiome patterns were linked with higher disease risk
The results showed meaningful differences.
One particular microbiome pattern, known as the Bacteroides 2 enterotype, was associated with higher systemic inflammation and a less favorable metabolic profile.
People with this microbiome pattern also had a 21% higher overall rate of new hospital-associated diagnoses during follow-up compared with people with the other microbiome patterns.
The increased risk was not limited to one type of disease. Associations were observed across several areas of health, including circulatory, respiratory, digestive and musculoskeletal conditions.
A more diverse microbiome showed a different pattern
Researchers also identified a microbiome pattern characterized by relatively high microbial diversity.
People with this pattern tended to have lower systemic inflammation and more favorable physiological measures.
They also had a 21% lower overall rate of new hospital-associated diagnoses during follow-up.
This adds to growing evidence that characteristics of the gut microbiome may be connected with health trajectories across adulthood.
But it does not mean that microbial diversity alone determines whether someone will remain healthy.
Inflammation may be part of the connection
One possible link between the microbiome and disease is chronic low-grade inflammation.
In the study, the microbiome pattern associated with higher disease risk was also associated with higher levels of several inflammatory markers.
Statistical analyses suggested that inflammation explained part of the relationship between this microbiome pattern and later disease.
This provides an interesting biological connection:
gut microbiome → systemic inflammation → disease risk
However, the real relationship is likely to be much more complex.
Can a microbiome test predict your future health?
Not yet.
This research looked at associations across large groups of people. It does not mean that examining one person’s microbiome can reliably predict whether that individual will develop cardiovascular disease, diabetes or another condition.
The microbiome is also influenced by many factors, including diet, medications, lifestyle and existing health conditions.
Most importantly, this study cannot prove that the microbiome itself caused the later diseases.
Future studies will need to determine whether changing the microbiome can actually change long-term disease risk.
What does this mean for healthy aging?
Healthy aging is not only about how long we live. It is also about reducing the years spent with chronic disease and disability.
The possibility that the gut microbiome is connected with inflammation and future disease makes it an important area of longevity research.
For now, microbiome profiles should be viewed as one part of a much larger picture of health, rather than as a stand-alone prediction of our future.
Based on Research
Eriksen C, Chatzigiannidou I, Dehli RK, et al. Gut microbiota composition outperforms chronological age in predicting systemic inflammation and incident disease risk. Nature Communications. 2026.
