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Fiber

Inulin (Chicory Root)

Also known as: chicory inulin, chicory root fiber, oligofructose, FOS precursor

B
Evidence

Inulin is a prebiotic soluble fiber from chicory root that resists digestion and ferments in the colon, selectively feeding beneficial bacteria. Moderate evidence supports its use for digestive health, cholesterol management, and blood glucose control.

Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.

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Primary uses

  • Prebiotic support for gut microbiome
  • Digestive regularity and fiber intake
  • Cholesterol management
  • Blood glucose regulation
  • Calcium absorption enhancement

How it works

  • Prebiotic fermentation promoting Bifidobacterium and Lactobacillus growth
  • Increased stool bulk and colonic transit
  • Reduced hepatic glucose production and improved insulin sensitivity
  • Enhanced mineral bioavailability through acidification

Dosage

Typical range
5–20 g daily
Timing
With meals or divided doses throughout the day
With food
Take with adequate water; can be mixed into foods, beverages, or yogurt
Duration
Safe for long-term use; benefits to microbiome typically emerge over 2–4 weeks
Special populations
Start low (3–5 g) and titrate gradually to minimize GI bloating; caution in IBS-sensitive individuals and those with fructose malabsorption

Forms

  • Powder· 70/100
  • Capsules· 70/100
  • Whole chicory root· 70/100

Safety

Common side effects

  • Bloating and gas (especially at higher doses)
  • Abdominal discomfort
  • Mild cramping during initial titration
  • Loose stools if dose exceeds tolerance

Contraindications

  • Fructose intolerance or malabsorption
  • Severe IBS or small intestinal bacterial overgrowth (SIBO)
  • Chicory allergy (rare)
  • Ragweed allergy (botanical cross-reactivity possible)

Evidence notes

Good evidence from multiple RCTs and meta-analyses for prebiotic effects, lipid profiles, and glycemic control. Well-established safety profile and mechanism. Not as extensively studied as psyllium or other fibers, but solid clinical evidence base.

Grade B: Some human trials support key claims; further confirmation needed.

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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.