Large Intestine
Nutrients connected to Large Intestine
A link means the body needs the nutrient for this, or that low intake is linked to it. It does not mean extra supplements help if your intake is already adequate; each link shows how strong the evidence is.
- Inulin and chicory root fibrePreliminary or mixed
Undigested inulin reaches the large intestine, where bacteria ferment it.
- Rhubarb rootClinically supported
The laxative action is on the bowel. Long-term use can discolour the colon lining, which usually returns to normal after stopping.
- Senna Tea (Laxative Teas)Preliminary or mixed
Senna acts on the large bowel as a stimulant laxative; the EU accepts it for short-term occasional constipation. No tea-specific trial was found.
- Prebiotic fibresLab or animal research only
Undigested fibre is fermented by bacteria in the large bowel. Fermentation markers such as lower stool pH are seen, but clinical benefit is not established.
- Fibre supplements (psyllium, methylcellulose, calcium polycarbophil and others)Clinically supported
Stool bulk and moisture are formed in the large intestine; trial evidence is for psyllium in constipation.
- SennaClinically supported
Stimulant laxative action on the lower bowel; blockage and inflammatory bowel disease are contraindications.
- PsylliumClinically supported
Eases constipation and keeps stool soft.
- PlumsClinically supported
Prunes (dried plums) eased mild to moderate constipation in trials; a guideline rates most diet evidence low certainty. Results are for dried plums, not fresh.
- Prunes (Dried Plums)Clinically supported
The studied effect is on stool frequency and consistency; it works through fiber and sorbitol in the bowel.
- Gut Health Blends (Probiotic, Fiber, Enzymes)Preliminary or mixed
Gut bacteria in the large intestine ferment fiber and make gas, which is why prebiotic fiber can cause bloating.
- Vitamin KEstablished role
Bacteria in the lower gut make some vitamin K; poor gut absorption is a cause of deficiency.
- Lactobacillus acidophilus and the acidophilus groupPreliminary or mixed
The conditions studied (C. difficile diarrhoea, antibiotic-associated diarrhoea) mainly affect the large intestine; benefit applies only to the specific tested mixture.
- Chicory rootPreliminary or mixed
The fiber is fermented by bacteria in the large bowel, and stools became softer and more frequent in trials.
- Kutaja (kurchi)Preliminary or mixed
Traditionally used for dysentery and colitis-type conditions; evidence limited to a tiny trial and lab studies.
- WheatgrassPreliminary or mixed
Used for active ulcerative colitis symptoms; one small one-month trial was positive and a 2013 review called the studies limited.
- FigsPreliminary or mixed
Constipation trials with fig syrup or paste; limited evidence.
- Sunflower SeedsDocumented risk
Case reports describe seed masses in the rectum after large amounts of unshelled seeds.
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