Bacteroidales is a broad order of bacteria that make up a major portion of the human gut microbiome. Members of this group—including Bacteroides and several related families—are essential for breaking down complex carbohydrates, producing short-chain fatty acids, and supporting normal digestive activity. They also help regulate immune responses and maintain the structural balance of the microbial ecosystem.
Balanced levels of Bacteroidales contribute to efficient digestion, metabolic health, and a strong gut barrier. However, shifts in abundance can be meaningful. Low levels may reflect reduced microbial diversity, insufficient fiber intake, or recent antibiotic exposure. High levels are often associated with inflammatory activity, high-fat or low-fiber diets, impaired digestion, or patterns commonly seen in gut dysbiosis.
On the Gut Zoomer panel, Bacteroidales results help clarify the overall landscape of the microbiome, offering insight into digestive efficiency, dietary influences, and the presence of microbial imbalance.
Bacteroidales
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