# Astaxanthin - Clinical Longevity Review & Consensus Audit

> **Consensus Verdict**: Take astaxanthin today to help protect your skin from sun damage and reduce eye fatigue, while its potent antioxidant properties work to combat cellular aging for long-term health.

## 1. Executive Summary & Scores
- **Longevity Evidence Score**: **89/100**
- **Evidence Quality Tier**: **silver**
- **Human Clinical Evidence Strength**: 82/100
- **Primary Longevity Classification**: supplements
- **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
A unique carotenoid that physically spans the lipid bilayer of cell membranes, providing superior protection against mitochondrial lipid peroxidation.

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## 3. Canonical Longevity Vector Impacts (The 8 Longevity Pillars)
- **Cellular Longevity & Autophagy**: **82/100** [Rank #53 of 131 in Cellular] - Effect: Maintains genomic stability, telomeric integrity, extracellular collagen matrix, and mitochondrial proteostasis
    - Mechanism: Activates nuclear transcription factors (SIRT1/RAR), photobiomodulates cytochrome c oxidase, or enhances DNA strand break repair.

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## 4. Practical Protocol & Administration Guidelines
- **Standard Clinical Dosage**: 4-12mg
- **Recommended Timing**: With Fats
- **Administration Type**: supplement
- **Recommended Biomarkers to Monitor**: cellular_longevity, endurance, skin_clarity, memory, joint_comfort

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## 5. Safety, Contraindications & Drug Interactions
- **Contraindications**: 
- **Safety Profile**: low_risk - Well tolerated within physiological ranges.

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## 6. Peer-Reviewed Human Clinical Trials & Key PMIDs
1. **Effects of astaxanthin-rich Haematococcus pluvialis extract on cognitive function: a randomised, double-blind, placebo-controlled study** [PMID: 22973117]
   - Link: https://pubmed.ncbi.nlm.nih.gov/22973117
2. **Effect of astaxanthin on cycling time trial performance** [PMID: 21984399]
   - Link: https://pubmed.ncbi.nlm.nih.gov/21984399
3. **Cosmetic benefits of astaxanthin on humans subjects** [PMID: 22428137]
   - Link: https://pubmed.ncbi.nlm.nih.gov/22428137
4. **Astaxanthin decreased oxidative stress and inflammation and enhanced immune response in humans** [PMID: 20205888]
   - Link: https://pubmed.ncbi.nlm.nih.gov/20205888
5. **NAD+ Intermediates and Longevity Therapeutics** [PMID: 30894380]
   - Link: https://pubmed.ncbi.nlm.nih.gov/30894380/
6. **Effects of Astaxanthin Supplementation on Oxidative Stress and Retinal Blood Flow in Humans** [PMID: 22865912]
   - Link: https://pubmed.ncbi.nlm.nih.gov/22865912/

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## 7. Canonical Citation & Web Verification
- **Official Web Review**: [Astaxanthin on LongevityReviews](https://longevityreviews.org/modalities/astaxanthin)
- **Last Evidence Calibration**: 2026-07-30
- **Review Policy**: 0% sponsored placements, independent peer-reviewed consensus.