Fiber and Fermented Foods

Fiber is important but its effects depend on type, dose, tolerance, and context. A gradual fiber ramp-up is recommended because sudden increases can cause intolerance. The Stanford fiber and fermented-food study is described as suggestive but limited because it was small and lacked a control group. A Stanford study found fermented foods increased microbial diversity and reduced inflammatory markers, while fiber's dominant effect was less clear. Fermented foods may affect the wider microbiome through cross-feeding rather than simply implanting their original microbes.