07/02/2026
Dr. Jodi's Straight Talk 🫶
I talk about fermented foods with my patients all. the. time.
And every now and then science comes along and says, "Hey Dr. Jodi...you might be onto something."
A fascinating study out of Stanford compared two gut-focused dietary approaches over 17 weeks:
One group increased fiber intake.
The other increased fermented foods.
Most people (and honestly, many researchers) expected the fiber group to come out on top. The logic seems obvious: fiber feeds beneficial bacteria, so more fiber should equal a healthier microbiome and lower inflammation.
Except...that's not what happened.
The high-fiber group showed little change in overall inflammation, and microbial diversity remained relatively stable. Their existing bacteria essentially got busier doing their jobs, but the neighborhood itself didn't really expand.
The fermented-food group, however, told a different story.
As fermented food intake increased, inflammatory markers steadily decreased and microbiome diversity increased.
Translation?
Your gut may not need more food for the microbes already living there.
Sometimes it needs new microbial neighbors moving into the neighborhood.
Fermented foods bring both living organisms and the beneficial compounds created during fermentation. Think of it as expanding the orchestra instead of simply turning up the volume on the same instruments.
Now before anyone tosses out their oatmeal ...
Fiber is still incredibly important.
Fiber supports bowel health, blood sugar regulation, cholesterol balance, cardiovascular health, and provides fuel for beneficial microbes.
What this study showed is that when it came specifically to increasing microbial diversity and lowering inflammatory markers, fermented foods appeared to be the stronger lever in this group of healthy adults.
An important takeaway: not everyone responded to fiber the same way. Researchers found that responses depended largely on the person's starting microbiome diversity. In other words, your gut is unique, and what works beautifully for one person may not work the same for another.
That's why one-size-fits-all nutrition makes me bonkers.
Because if you've spent any time with or following me, you already know...there is no protocol, supplement, or diet that works for everyone.
Your body isn't a math equation.
It's an ecosystem.
And ecosystems thrive on diversity.
So maybe it's time to invite a few more fermented friends to the party:
* Sauerkraut
* Kimchi
* Kefir
* Yogurt with live cultures
* Kombucha
* Traditionally fermented vegetables
Your microbes may send you a thank-you note.
Digestion issues are a big deal when the processing plant is struggling to process!
Curious whether your gut symptoms, food sensitivities, or inflammation patterns may be connected to microbiome health? Schedule a consultation and let's look at the whole picture together. My July slots are almost full. I have 2 more openings for 3 month protocols and 1 6 month open. 219-713-4789 office
Dr Jodi🫶
References
Wastyk HC, Fragiadakis GK, Perelman D, et al. Gut-microbiota-targeted diets modulate human immune status. Cell. 2021;184(16):4137-4153.e14. doi:10.1016/j.cell.2021.06.019.
Reynolds A, Akerman A, Mann J. Dietary fibre and whole grains in diabetes management: Systematic review and meta-analyses. PLoS Medicine. 2020;17(3):e1003053.