# Aged Garlic Extract (1,200mg Kyolic) - Clinical Longevity Review & Consensus Audit

> **Consensus Verdict**: Multiple double-blind placebo-controlled human clinical trials (Ried et al. Front Nutr 2018 & Budoff et al. JACC 2020).

## 1. Executive Summary & Scores
- **Longevity Evidence Score**: **88/100**
- **Evidence Quality Tier**: **silver**
- **Human Clinical Evidence Strength**: 82/100
- **Primary Longevity Classification**: supplements
- **Safety Margin Score**: 76/100 (Higher is safer)
- **Time Burden**: ~15 minutes/day
- **Estimated Monthly Cost**: moderate
- **Adherence Friction**: 3/10 (Lower is easier to sustain)

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## 2. Biological Mechanisms of Action
Endogenous H2S generation dilates vascular smooth muscle via K_ATP channels; SAC suppresses LDL oxidation and foam cell formation.

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## 3. Canonical Longevity Vector Impacts (The 8 Longevity Pillars)
- **Heart Health & Endothelial Function**: **90/100** [Rank #10 of 133 in Heart] - Effect: -8.7 mmHg SBP, -0.7 m/s Carotid-Femoral PWV, -80% low-attenuation coronary plaque progression
    - Mechanism: S-Allyl Cysteine stimulates glutathione synthesis, donates vascular H2S, and relaxes arterial smooth muscle cells.
- **Brain Longevity & Neuroprotection**: **70/100** [Rank #90 of 141 in Brain] - Effect: Preserves cerebral microcirculation and protects against glutamate excitotoxicity
    - Mechanism: H2S gasotransmitter enhances synaptic transmission and prevents neuronal apoptosis.
- **Metabolic Flexibility & Glycemic Control**: **75/100** [Rank #49 of 129 in Metabolic] - Effect: Mild reduction in total cholesterol and protection of circulating liposomes against oxidation
    - Mechanism: Inhibits hepatic fatty acid and cholesterol synthesis enzymes while scavenging lipid peroxyl radicals.
- **Cancer Defense & DNA Repair**: **62/100** [Rank #31 of 120 in Cancer Defense] - Effect: Induces cell cycle arrest in abnormal colonic epithelial cells
    - Mechanism: Organosulfur compounds downregulate Phase I carcinogen bioactivation and induce apoptosis in mutated cells.
- **Endocrine & Anabolic Balance**: **0/100** [Rank #97 of 120 in Endocrine] - Effect: Neutral direct Leydig steroidogenesis.
    - Mechanism: Organosulfur cardiovascular pathway without endocrine modulation.
- **Chronic Inflammation Reduction**: **74/100** [Rank #62 of 126 in Inflammation] - Effect: Reduces circulating vascular TNF-alpha and interleukin-6 in vascular tissue
    - Mechanism: Blocks IkappaBalpha phosphorylation, preventing NF-kB translocation into endothelial cell nuclei.
- **Bone Density & Connective Matrix**: **0/100** [Rank #121 of 142 in Bone Matrix] - Effect: Neutral direct skeletal remodeling.
    - Mechanism: Vascular supplement without direct osteoblastic activity.
- **Cellular Longevity & Autophagy**: **80/100** [Rank #74 of 131 in Cellular] - Effect: Upregulates cellular glutathione transferase and activates nuclear Nrf2 target genes
    - Mechanism: Organosulfur compounds electrophilically modify Keap1 cysteine residues, liberating Nrf2 to drive endogenous antioxidant defenses.

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## 4. Practical Protocol & Administration Guidelines
- **Standard Clinical Dosage**: 1,200mg daily (standardized to >=1.2mg S-Allyl Cysteine) with dinner
- **Recommended Timing**: Evening with dinner
- **Administration Type**: supplement
- **Recommended Biomarkers to Monitor**: Blood Pressure, Pulse Wave Velocity, Coronary Calcium Score

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## 5. Safety, Contraindications & Drug Interactions
- **Contraindications**: Upcoming major surgery within 7 days (mild platelet anti-aggregation)
- **Safety Profile**: high_safety - Very high safety profile. Gentle on stomach. If taking anticoagulant prescription drugs (warfarin/heparin), consult physician.

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## 6. Peer-Reviewed Human Clinical Trials & Key PMIDs
1. **The Effect of Kyolic Aged Garlic Extract on Gut Microbiota, Inflammation, and Cardiovascular Markers in Hypertensives (Front Nutr 2018)** [PMID: 29594140]
   - Link: https://pubmed.ncbi.nlm.nih.gov/29594140/

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## 7. Canonical Citation & Web Verification
- **Official Web Review**: [Aged Garlic Extract (1,200mg Kyolic) on LongevityReviews](https://longevityreviews.org/modalities/aged-garlic-extract-kyolic)
- **Last Evidence Calibration**: 2026-09-10
- **Review Policy**: 0% sponsored placements, independent peer-reviewed consensus.