Substances that affect gut health

Substances that affect gut health support the gut microbiota, digestion, and gut function.
Fiber is the most important 'fuel' for the gut microbiota.
Fiber increases stool bulk, regulates bowel function, and feeds beneficial bacteria.
Prebiotics are special types of fiber that feed beneficial gut bacteria.
Probiotics are live microbes that can support the balance of the gut microbiota.
Especially soft fats support the well-being of the intestinal mucosa.
Gut bacteria utilize polyphenols, and they can support the diversity of the microbiota.
Not a nutrient, but essential. Fiber needs water to work, and adequate drinking supports normal bowel movement.
Fermented foods produce organic acids and other compounds that can support gut function.