12/03/2026
I recently ran stool microbiome testing on four members of my family with
Here I’m looking closely at one bacterium that has received a lot of attention in microbiome research: Akkermansia muciniphila.
Two of us had almost zero, or almost zero.
Two of us had healthy levels.
The most obvious dietary difference that we could see? The two with higher levels regularly consume kefir and yoghurt.
An important detail: kefir does not contain Akkermansia itself. It is an anaerobic bacterium that lives in the gut mucus layer and cannot survive in fermented foods.
Instead, fermented foods appear to support the broader microbial ecosystem, which may allow beneficial microbes to thrive. Some human studies have observed increases in Akkermansia following kefir consumption, although this does not establish direct causation.
Akkermansia has attracted interest because lower levels have been observed in several metabolic and inflammatory conditions, including obesity, type 2 diabetes and inflammatory bowel disease. At the same time, higher levels have been associated with improved metabolic markers and gut barrier function. Although as always, you can have too much of a good thing! Very high levels are associated with a range of other conditions too. Microbiome science is rarely simple.
Interestingly, one of us with low Akkermansia actually had the highest overall microbiome diversity score, which is often considered a positive indicator of microbiome resilience. Fun fact, this person was me! I’m now on a mission to see if I can boost my Akkermansia...
So while Akkermansia is a fascinating organism, it is clearly not the whole story.
For the next few months we’re making a few changes:
• daily fermented foods
• more polyphenol-rich plants
• higher omega-3 intake
We’ll repeat the test in around three months and see whether anything shifts.
The microbiome is dynamic, which is what makes experiments like this interesting.
Have you ever tested your microbiome? What did you find?