Nutrition
Postbiotic
Postbiotics are health-supporting metabolites made when gut microbes ferment fiber—best supported by whole foods, not hype around isolated powders.
Postbiotics are beneficial compounds produced when gut microbes ferment fiber—short-chain fatty acids, peptides, and other metabolites—not the live bacteria themselves. They may support gut barrier and immune signaling in emerging research.
Whole-food fiber and fermented foods remain the most reliable way to nourish production; isolated postbiotic supplements are still early.
Common questions
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Are postbiotics the same as probiotics?
No—probiotics are live microbes; postbiotics are their beneficial outputs and byproducts. Eating diverse fiber feeds postbiotic production more reliably than a single pill.
Related terms
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