TL;DR
Get health and wellness essentials delivered free with Prime
- Fast, free delivery on millions of items
- Prime Video, Amazon Music and more included
- Member-only deals all year
Researchers at the University of Hawaiʻi at Mānoa found that gut bacterial patterns were associated with blood-based measures of biological aging in 123 adults. The microbiome accounted for about 15% of variation in aging rates in the study, but the findings do not show that changing gut bacteria can slow aging.
Researchers at the University of Hawaiʻi at Mānoa report that gut bacterial communities were associated with blood-based measures of the pace of biological aging in a study of 123 adults. The findings, published in Scientific Reports, link some bacterial patterns with slower aging measures and others with faster ones, but do not establish that gut microbes cause those differences or that changing them would slow aging, as explored in research on gut bacteria and brain aging.
The team analyzed stool and blood samples from adults across a wide range of ages. They identified participants’ gut bacteria and compared the microbial communities with molecular markers intended to estimate how quickly aging-related changes are occurring. The measure highlighted in the report was DunedinPACE, a blood-based biomarker of the pace of biological aging. It differs from chronological age, which counts the years a person has lived.
Differences in gut bacterial communities accounted for approximately 15% of the variation in participants’ measured biological aging rates, according to the study summary. The researchers reported that Bifidobacterium adolescentis was among the microbes most strongly associated with slower biological aging, while Succinivibrio dextrinosolvens had one of the strongest associations with faster aging. These are associations found in this sample, not evidence that either species changes a person’s aging rate.
The researchers said the microbiome was associated with molecular aging measures even after accounting for chronological age, a topic also discussed in research on gut-produced molecules and Alzheimer’s risk. The study also included Native Hawaiian and Pacific Islander participants, populations the authors say have been underrepresented in research on aging and gut microbes. The source material does not specify the number of participants in those groups or provide enough detail to assess how the findings varied across demographic groups.
Why Gut Microbes Matter to Aging Research
The findings add evidence that the gut microbiome may contain clues about biological aging, a process that can differ among people of the same chronological age. If further studies confirm these patterns, microbial measurements could help researchers investigate why aging-related health changes vary and whether factors that shape gut communities are connected to long-term health.
The microbiome is of interest partly because it can respond to diet, lifestyle, and environmental exposures. That makes it a potential subject for research into individual differences in health, but it does not mean that a particular food, supplement, or microbial product has been shown to slow aging. The study measured associations; it did not test an intervention or report that participants’ health or longevity improved.
Including Native Hawaiian and Pacific Islander participants also broadens the populations represented in this area of research. Co-author Ruben Juarez said studying the microbiome could help examine how social and environmental conditions relate to biology over time. The reported findings alone do not establish those pathways or explain the effects of any specific social circumstance.
Products Worth Considering
Levoit Vital Pet Pro Smart Air Purifier for Pets, White
Theragun Mini 3rd Generation Massage Gun – Travel Essential (Black)
Therabody SleepMask Blackout Eye Mask with Vibration
As an affiliate, we earn on qualifying purchases.
How the Study Measured Aging
The research compared two different ways of describing age. Chronological age is the time elapsed since birth. Biological aging measures use molecular indicators to estimate changes occurring in the body; here, the researchers used blood-based markers and focused on DunedinPACE, which estimates the pace of those changes rather than simply assigning an age in years.
The University of Hawaiʻi at Mānoa team examined microbial patterns alongside those measures in a cross-sectional sample of 123 adults. The report presents the work as an early step in understanding the relationship between gut microbes and aging. It does not describe a long-term trial in which researchers changed participants’ microbiomes and tracked whether aging slowed.
Lead author Braden P. Kunihiro said the gut microbiome is responsive to everyday exposures and could be relevant to precision health research, which studies differences among individuals. The study’s design can identify relationships worth investigating, but it cannot by itself determine whether the bacteria influence biological aging, whether aging influences the bacteria, or whether other factors affect both.
“The gut microbiome is highly responsive to lifestyle, diet, environment and other everyday exposures.”
— Braden P. Kunihiro, lead author
Cause and Effect Remain Unknown
The study does not establish cause and effect. Finding a bacterium more often in people with a slower biological-aging measure does not show that the microbe slowed aging. The relationship could run in the other direction, or be shaped by other influences that affect both gut bacteria and aging markers.
The researchers say further work is needed to identify the mechanisms involved and test whether deliberately changing the microbiome alters biological aging or long-term health. The report does not establish a specific diet, probiotic, supplement, or treatment that produces such an effect. It also does not show whether the observed associations apply broadly beyond the 123 people studied, or how stable the bacterial patterns are over time.
Testing Microbiome Changes Over Time
The next research step is to examine the reported microbial signatures in larger and longer-term studies, while testing whether the associations hold across different populations and circumstances. Researchers will also need to investigate possible biological mechanisms and account for factors such as diet, lifestyle, environment, and social conditions.
To determine whether gut bacteria can affect aging rather than simply track with it, future studies would need to test changes to the microbiome and measure subsequent outcomes. Maunakea said that work will help clarify whether the findings can contribute to precision approaches to healthy aging. Until such evidence is available, the results are best understood as a research association, not proof that a person can slow aging by changing their gut bacteria.
Key Questions
Did the study prove that gut bacteria can slow aging?
No. The study found associations between gut bacteria and biological-aging measures, but it did not show that the microbes caused slower or faster aging.
Which bacteria were associated with aging measures?
Bifidobacterium adolescentis was among the microbes most strongly associated with slower biological aging. Succinivibrio dextrinosolvens had one of the strongest associations with faster aging. The findings do not show that either bacterium determines an individual’s aging rate.
How many people took part?
The researchers analyzed stool and blood samples from 123 adults across a wide range of ages.
Can a diet or supplement based on this study slow aging?
The study did not test a diet, supplement, or other intervention. It provides no evidence that a specific product or change slows aging; further research is needed to test whether altering the microbiome affects biological-aging measures.
Source: sciencedaily.com
