Myco-foods, including mycelial extracts, biomass, and mold-fermented foods, changed the gut microbiome in all 4 human trials reviewed, including 2 extract trials, 1 biomass trial, and 1 fermented food trial. Across 20 total human, animal, and in vitro studies, these fungal foods often increased beneficial gut microbes like Akkermansia, Bifidobacterium, lactobacilli, Roseburia, and Eubacterium, with several studies also raising short-chain fatty acids tied to fiber metabolism. Mycoprotein from Fusarium venenatum contains 45% protein and 25% fiber by dry weight, making fungi-based foods a serious gut-health and protein story.