Gut microbes may cooperate to share essential B-vitamins with one another

Health · Published 19 October 2026 Swipe more like this →

In short: Researchers who systematically analyzed the genomes of 256 common human gut bacteria found that many species lack the ability to produce essential B-vitamins on their own. However, the study suggests that these microbes likely cooperate by exchanging vitamins, allowing species without their own synthesis pathways to survive in the human digestive tract.

The team used the PubSEED platform to predict vitamin production across various bacteria, finding that 40-65% of the microbes could produce each of the eight B-vitamins. By identifying complementary synthesis patterns, the study suggests a co-evolved system where microbes share nutrients. This computational assessment is limited by its reliance on genome annotations and predictions rather than direct observation of exchange in a live environment.

Why it matters: Your gut microbes may work as a community to share vital nutrients, making the microbiome a key source of B-vitamins.

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