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Intolerances

Gut microbiota and metabolism

Pathogens and infections

Treatment and tests

Everyday life and body

Chapters that readers rate at 4 out of 5 stars or more on average for this question. An average only exists from 3 ratings. You can choose several.

Opportunistic pathogens

Germs that only become a problem when the balance is off. 1 chapter – expand
  • Level:Intermediate When the gut does not settle after an infection Stomach bug, food poisoning, traveller's diarrhoea: why symptoms sometimes stay. Gut infectionsIBSDiarrhoeaBile acids Well supported 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.

Gut-brain axis

How stress, sleep and nerves steer digestion. 1 chapter – expand
  • Level:Intermediate Gut-directed hypnotherapy and psychological therapy: treatment via the gut-brain axis Why gut-directed hypnotherapy and CBT are among the best-proven treatments for IBS, how they work, what apps can do, and why "limbic retraining" is something else. PsychotherapyIBSStress Well supported 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.

Small intestine colonisation

When bacteria grow where few belong. 1 chapter – expand
  • Level:Intermediate Doing low-FODMAP right The best-studied diet for bloating, and why it is only meant to be temporary. FODMAPBloatingIBS Well supported 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.