Hermetica Superfood Encyclopedia
Legacy index-continuity record: the score and narrative are provisional and must not be represented as validated or human-approved.
Review flags: AWAITING_SEMANTIC_VALIDATION
Astaxanthin from Haematococcus pluvialis is a potent carotenoid antioxidant that crosses the blood-brain and blood-retina barriers. It reduces oxidative stress through singlet oxygen quenching and supports skin, eye, and cardiovascular health.
Reported Benefits (Provisional)
Origin & History
Astaxanthin is a carotenoid pigment found in the microalga Haematococcus pluvialis. It is harvested and extracted for use in supplements.
Research Narrative (Provisional)
Numerous studies, including RCTs, have examined astaxanthin's antioxidant properties and potential health benefits, showing promise in reducing oxidative stress.
Preparation & Dosage
Dosage guidance is withheld because the publication gate has not recorded adequate support for this profile.
Nutritional Profile
Astaxanthin (Haematococcus pluvialis) is a xanthophyll carotenoid with negligible macronutrient contribution at typical supplemental doses. Primary bioactive compound: Astaxanthin at 1.5–5% dry weight concentration in Haematococcus pluvialis algae biomass; commercial extracts typically standardized to 2–10% astaxanthin content. Standard supplemental doses range from 4–12 mg per serving. The molecule exists in three stereoisomeric forms: (3S,3'S), (3R,3'S) meso, and (3R,3'R); H. pluvialis yields predominantly the (3S,3'S) free-form isomer (~97%), considered the most bioavailable and biologically active form. Minor carotenoids co-present include beta-carotene (~0.3–0.5% dry weight), canthaxanthin (~0.1–0.3%), and lutein (~0.1%). Lipid content in whole algae: ~20–25% dry weight, primarily polar lipids (phospholipids and glycolipids) which enhance astaxanthin bioavailability. Esterified forms (mono- and di-esters with fatty acids) predominate in raw H. pluvialis (~95% esterified); bioavailability of esterified vs. free form is comparable after intestinal hydrolysis. Fat-soluble compound requiring dietary fat co-ingestion for optimal absorption (~40–60% improved absorption with lipid-rich meal). Protein content in whole algae biomass: ~25–35% dry weight, though negligible in purified extracts. Vitamin E (alpha-tocopherol) may be present as a co-antioxidant stabilizer in commercial formulations at ~5–15 IU per serving. No significant mineral, fiber, or water-soluble vitamin content at typical supplemental doses.
Reported Mechanism (Provisional)
Astaxanthin neutralizes singlet oxygen and free radicals through its conjugated polyene chain structure with terminal ionone rings. It modulates inflammatory pathways by inhibiting NF-κB activation and reducing pro-inflammatory cytokines like TNF-α and IL-6. The compound also enhances mitochondrial function by protecting membrane phospholipids from lipid peroxidation.
Clinical Narrative (Provisional)
Multiple randomized controlled trials with 20-100 participants demonstrate astaxanthin's efficacy at 6-12mg daily doses. Studies show 40% reduction in oxidative stress markers, 25% improvement in skin elasticity after 6-8 weeks, and enhanced visual acuity in computer eye strain trials. Most research involves small sample sizes with 4-16 week durations, indicating promising but preliminary evidence requiring larger long-term studies.
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