Before you buy another gut-health product, hear what the human research actually found. Stanford nutrition scientist Christopher Gardner, PhD, explains the evidence on fiber, fermented foods, and inflammation.
When you're trying to feel better, a promise of billions of beneficial bacteria can sound convincing. But what do those numbers really tell you about the product you're buying?
Gardner joins Chuck Carroll on The Exam Room Podcast to unpack a human trial that surprised his own research team. The fermented-food group increased gut microbial diversity and had lower levels of several inflammatory markers, while the fiber group's responses were more complicated. He explains why these findings do not mean fiber has failed, and why a study of foods cannot automatically validate every product marketed for your microbiome.
In this episode:
What prebiotics, probiotics, synbiotics, and postbiotics mean
Why a bigger CFU count does not establish a better health outcome
How fermented foods and fiber produced different results in a small human trial
Why mouse findings did not predict the human results
Why fibermaxxing can be a rough transition for your gut
The limits of research measurements of inflammation
Gardner's response to seed-oil claims
How to build a varied, plant-rich eating pattern you can sustain
What he has learned from making 250 batches of kombucha
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