Your gut contains trillions of microorganisms that do far more than help digest food. Increasing research suggests that these microbes can influence inflammation, metabolism and insulin sensitivity — and may therefore play a role in the development of type 2 diabetes.
A recent study has identified a potential mechanism linking diet, gut bacteria and blood sugar control.
How does it work?
A nutrient called choline, found in foods such as eggs, fish, dairy, meat and some plant foods, can be processed by gut bacteria into a compound called trimethylamine (TMA).
Researchers found that TMA can interact with a protein called IRAK4, which plays an important role in triggering inflammation.
When IRAK4 activity is reduced, inflammation decreases and insulin sensitivity improves. This is important because insulin resistance — when cells become less responsive to insulin — is one of the major problems underlying type 2 diabetes.
The researchers demonstrated these effects using mice, human cell models and molecular experiments.
What does this mean for your diet?
The findings highlight an important concept: what we eat doesn’t just affect our own cells — it also feeds the microorganisms living inside us.
However, this does not mean that eating more choline will prevent or cure diabetes. The research is still at an early stage, and much of the evidence comes from laboratory and animal experiments.
For now, the broader lesson is more practical: a balanced diet that supports a diverse and healthy gut microbiome — particularly one rich in minimally processed foods and dietary fiber — may be an important part of maintaining good metabolic health.
The gut may be one of the most important pieces of the puzzle when it comes to understanding how nutrition affects long-term health.
SOURCE: The original study was published in Nature Metabolism. Researchers from Imperial College London and collaborating institutions investigated the choline → gut microbes → TMA → IRAK4 pathway.
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