Also known as: Psyllium husk, Prebiotic fiber, Inulin
Latest evidence update: 2026-12-31
Strongest in Sample size (95). Held back by Recency (49).
Solid mix of RCTs with some methodological gaps.
Confirmed across many independent studies with significant findings.
Tens of thousands of participants pooled across studies.
Mostly aligned, with some divergence.
Evidence base skews older; field may have moved on.
Effect-size tagged on 387 of 400 claims for this supplement. Our research updates daily; remaining claims are pending re-processing.
Areas where research points to a consistent direction of effect. The strength of evidence is graded; the size of the effect is not quantified.
Recommended: Varies by form and individual needs
ProtocolEngine provides general health information based on published research. This is not medical advice. Consult a healthcare professional before starting any supplement or health protocol.
Helps lower blood pressure in people with high blood pressure
Supports weight management and body composition in adults with excess weight
Improves bowel regularity and stool consistency in adults with chronic constipation
Reduces triglycerides and improves cholesterol levels in people with type 2 diabetes
Lowers inflammation markers and reduces cancer-related mortality risk