# Viscous Fiber & Phytosterol ApoB Clearance - Clinical Longevity Review & Consensus Audit

> **Consensus Verdict**: 10g Psyllium Husk / Beta-Glucan + 2g Plant Phytosterols taken with main meals to trap intestinal bile acids and lower circulating ApoB.

## 1. Executive Summary & Scores
- **Longevity Evidence Score**: **91/100**
- **Evidence Quality Tier**: **silver**
- **Human Clinical Evidence Strength**: 94/100
- **Primary Longevity Classification**: nutrition
- **Safety Margin Score**: 92/100 (Higher is safer)
- **Time Burden**: ~15 minutes/day
- **Estimated Monthly Cost**: inexpensive
- **Adherence Friction**: 3/10 (Lower is easier to sustain)

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## 2. Biological Mechanisms of Action
Interferes with intestinal micellar cholesterol solubility (phytosterols) and sequesters bile acids (psyllium), inducing hepatic HMG-CoA reductase and LDLR transcription.

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## 3. Canonical Longevity Vector Impacts (The 8 Longevity Pillars)

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## 4. Practical Protocol & Administration Guidelines
- **Standard Clinical Dosage**: 10g Psyllium Husk + 2g Plant Phytosterols in water with main meals
- **Recommended Timing**: With Lunch & Dinner (12:00 PM & 06:30 PM)
- **Administration Type**: nutrition
- **Recommended Biomarkers to Monitor**: heart_health, satiety, digestive_comfort

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## 5. Safety, Contraindications & Drug Interactions
- **Contraindications**: None reported in standard human trials with recommended doses.
- **Safety Profile**: low_risk - Well tolerated within physiological ranges.

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## 6. Peer-Reviewed Human Clinical Trials & Key PMIDs
1. **Dietary viscous fiber modulates appetite regulation and gut microbial short-chain fatty acids** [PMID: 23885994]
   - Link: https://pubmed.ncbi.nlm.nih.gov/23885994/
2. **Cholesterol-lowering effects of dietary fiber: a meta-analysis of 67 clinical trials** [PMID: 9925120]
   - Link: https://pubmed.ncbi.nlm.nih.gov/9925120/
3. **Cholesterol-Lowering Effects of Psyllium Intake Adjunctive to Diet Therapy in the Treatment of Hypercholesterolemia: A Meta-Analysis of 8 Clinical Trials** [PMID: 10837285]
   - Link: https://pubmed.ncbi.nlm.nih.gov/10837285/

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## 7. Canonical Citation & Web Verification
- **Official Web Review**: [Viscous Fiber & Phytosterol ApoB Clearance on LongevityReviews](https://longevityreviews.org/modalities/dayspring-viscous-fiber-phytosterols)
- **Last Evidence Calibration**: 2026-08-08
- **Review Policy**: 0% sponsored placements, independent peer-reviewed consensus.