howtosupplement
Digestion/Mobility/Heart

Inulin

Soluble plant fiber that improves bowel regularity and feeds beneficial gut bacteria, used by adults with low fiber intake.

Inulin

Inulin

60
score
B
evidence
Caution
risk
Quick Take

Good for constipation and gut flora, but overhyped for weight loss and immune benefits.

Inulin is a soluble dietary fiber found in chicory root, onions, garlic, leeks, asparagus, and bananas. It resists digestion in the small intestine and ferments in the colon, where it selectively feeds beneficial bacteria such as Bifidobacteria. Clinical trials show it can soften stools and increase bowel movement frequency, and it may also improve calcium absorption and modestly lower LDL cholesterol. It is most useful for adults with low fiber intake, constipation, or those aiming to support gut microbiome diversity.

Proven Benefits

01
Relieves constipation
02
Increases Bifidobacteria
03
Improves calcium absorption
04
May lower LDL cholesterol
05
May support bone density

Protocol

Amount
3-10 g
Frequency
Once daily
When
With meals and adequate water to reduce bloating.

Onset Time

2-7 days for bowel regularity; 2-4 weeks for microbiome shifts.

Who Should Consider

Adults with low dietary fiber intake
People with occasional constipation
Postmenopausal women concerned about bone density
Adults seeking prebiotic gut support

Food Sources

  • Chicory root (~40-45% inulin by dry weight)
  • Jerusalem artichoke (~15-20%)
  • Garlic (~9-16%)
  • Onions (~2-6%)
  • Bananas (~1% unripe)

How It Works

Inulin is a fructan that passes undigested to the colon, where bifidogenic bacteria ferment it into short-chain fatty acids (SCFAs) such as butyrate. This fermentation increases stool bulk and softness, lowers colonic pH, and may improve mineral solubility and absorption. SCFA production also provides energy for colonocytes and may signal metabolic and immune pathways.

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