Microbiome research is one of the fastest-moving fields in nutrition science. The 2024–2026 literature has added significant nuance to our understanding of how keto affects gut bacteria populations.
A landmark 2024 Stanford study published in Cell found that high-fat, low-carb diets rapidly reduce gut microbiome diversity within 2 weeks. However, the reduction was concentrated in specific inflammatory species, with beneficial Akkermansia muciniphila simultaneously increasing.
Studies of individuals on keto for 12+ months show microbiome stabilisation with distinct, stable communities that differ from standard diet microbiomes but maintain adequate diversity. Long-term keto microbiomes show reduced inflammatory markers.
Daily fermented foods (full-fat yoghurt, kefir, sauerkraut), maximum keto-compatible fibre variety (leafy greens, artichoke hearts, asparagus), psyllium husk supplementation, and polyphenol-rich foods (olive oil, dark berries, dark chocolate) collectively support microbiome diversity.
Build microbiome-supportive meals using our fibre-rich keto salads and prebiotic-containing vegetable-forward keto mains.
Keto changes the microbiome significantly. With intentional dietary strategies, these changes can be steered toward better gut health outcomes.