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Digestive function
Stomach acid, bile and enzymes as groundwork for the gut. 5 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 Bile acids: when bile causes diarrhoea Primary and secondary bile acids, the role of gut bacteria and why antibiotics can shift the balance. Bile acidsDiarrhoeaIBSTests and diagnostics 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. Community
- Level:Intermediate Pressure under the right ribs: bile, liver and gallstones A feeling of pressure in the upper right abdomen makes many people think of the gallbladder. What makes a real biliary colic, what “thick bile” means medically, and which other causes are more common. Bile acidsTests and diagnosticsBody weightFasting 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. Community
- 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.
- Level:Intermediate Life without a gallbladder: diarrhoea, fat and symptoms after surgery Gallbladder removal is one of the most common operations, and most people do well afterwards. Why some get diarrhoea, what lies behind post-cholecystectomy syndrome and why cutting the sphincter usually does not help. Bile acidsDiarrhoeaTests and diagnostics 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. Community