Rankings / Longevity — Supplements
Astaxanthin
Longevity · Carotenoid antioxidant
Tier B+
Bottom line
Read Off Label grades Astaxanthin as B+ (7.1/10) based on moderate evidence, moderate benefit magnitude, and a low-risk safety profile.
Much of the positive trial literature comes from Japan.
Studied, labeled, or reported-use context: 4-12 mg/day PO with fat — OTC; not individualized guidance.
What the evidence says
Much of the positive trial literature comes from Japan. Eye fatigue / accommodative spasm indication is the most-replicated. Popular in aging-eye supplements and general 'super-antioxidant' positioning. Natural (H. pluvialis) has been used more often than synthetic astaxanthin in supplement trials.
Mechanism
Red carotenoid from Haematococcus pluvialis microalgae; crosses BBB and blood-retina barrier; unusually potent antioxidant (Miki 1991 reports ~6000x vitamin C in some assays — context-dependent); anti-inflammatory
Studied, labeled, or reported dose & route
4-12 mg/day PO with fat
This records doses and routes described in studies, approved labeling, clinical practice, or documented use. It is not individualized guidance and does not establish safety; context changes with indication, formulation, health history, monitoring, and other medicines.
Citations
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Common questions
- What does the evidence show about Astaxanthin's effects?
- Read Off Label rates the evidence for Astaxanthin as Moderate and the benefit magnitude as moderate, producing an overall grade of B+ (7.1/10). Much of the positive trial literature comes from Japan.
- What safety findings are reported for Astaxanthin?
- Astaxanthin has a low risk profile in the database. Low (well-tolerated; pink skin tinge at extreme doses; caution with anticoagulants at high doses) Legal status: OTC.
- What doses or routes are reported for Astaxanthin?
- 4-12 mg/day PO with fat This is context from studies, approved labeling, clinical practice, or documented use; it is not individualized guidance and does not establish safety.
- How does Astaxanthin work?
- Red carotenoid from Haematococcus pluvialis microalgae; crosses BBB and blood-retina barrier; unusually potent antioxidant (Miki 1991 reports ~6000x vitamin C in some assays — context-dependent); anti-inflammatory
This is an independent synthesis of published research by a non-clinician. Scores are opinions supported by citations, not prescriptions. See the full disclaimer and methodology for how this score was produced and what it does and doesn't mean.