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Microbial diversity
Why many different species keep the gut stable. 1 chapter – expand
- Level:Expert Anaerobic gut bacteria: why the good ones do not fit in a capsule The most important gut bacteria cannot tolerate oxygen. What makes them thrive, and why you can barely swallow them. ProbioticsShort-chain fatty acidsFibreFaecal transplant Promising How we rate the evidence Established Recommended in medical guidelines or supported by several consistent meta-analyses of randomised human studies. Well supported Several randomised studies in humans with largely consistent results. Promising Single randomised or controlled studies in humans, not yet independently confirmed — or many consistent observational studies. Plausible Two cases: first observational or pilot studies with small samples — or a settled basis that is not in dispute, such as movement, sleep or meal pauses. But not tested in humans for symptoms. Experimental Barely studied in humans. Mainly lab and animal studies or theoretical reasoning; whether it helps is open.