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Symptoms

Diet

Intolerances

Gut microbiota and metabolism

Pathogens and infections

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Digestive function

Stomach acid, bile and enzymes as groundwork for the gut. 3 chapters – expand

Level:Intermediate Stomach acid, bile and enzymes The groundwork in the stomach and small intestine determines what reaches the large intestine. Acid blockersMedicationBile acidsAlcoholBloatingTests and diagnostics 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.
Level:Intermediate Acid blockers (PPIs): what they change in the gut and how to stop them properly Proton pump inhibitors are among the most widely used medicines in the world. They are very effective for reflux and ulcers, but change the gut flora and nutrient absorption. What is established, what is not, and how to stop them. Acid blockersMedicationGut infectionsAllergies 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.
Level:Intermediate The digestive chain: how stomach acid, bile and pancreas set each other off Digestion is a relay race: the head starts, the acid passes the signal to the duodenum, hormones call up bile and enzymes. Who sends which signal, and what happens when one link is weak. Bile acidsAcid blockers 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.