Also known as: fiber intake, dietary fiber, prebiotic diet
Latest evidence update: 2026-12-31
Strongest in Sample size (95). Held back by Recency (50).
Solid mix of RCTs with some methodological gaps.
Confirmed across many independent studies with significant findings.
Tens of thousands of participants pooled across studies.
Studies agree on direction of effect.
Evidence base skews older; field may have moved on.
Areas where research points to a consistent direction of effect. The strength of evidence is graded; the size of the effect is not quantified.
Adequate fiber intake (25-35g/day) supports gut microbiome diversity, blood sugar regulation, and cardiovascular health. Every 5g increase in daily fiber reduces depression risk by approximately 5%.
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.
Dietary fiber and prebiotic supplementation significantly reduces systolic blood pressure in hypertensive patients by 8.5 mmHg.
Soluble fiber supplementation significantly reduced 2-hour postprandial plasma glucose in adults with type 2 diabetes compared to control diets.
Cereal fiber supplementation significantly increased butyrate concentration in healthy subjects and patients.
Additional dietary fiber supplements significantly reduced triglycerides in pregnant women with gestational diabetes mellitus.
Single fiber supplementation improved HOMA-IR (Homeostatic Model Assessment for Insulin Resistance) in individuals with overweight or obesity without type 2 diabetes.