Supplement
Astaxanthin
The red carotenoid with modest but consistent skin, eye, and lipid signals.
Astaxanthin is a carotenoid antioxidant found in salmon, krill, and algae. We grade Astaxanthin C+ on evidence and C+ for worth-it at about $10-20 per month.
Evidence
Worth it
Typical cost: $10-20/month
What it does
Astaxanthin is a carotenoid antioxidant found in salmon, krill, and algae. It accumulates in cell membranes where it quenches singlet oxygen and dampens inflammatory signaling, which is the proposed mechanism behind its skin, eye, and vascular effects.
What the research says
Improves skin elasticity and moisture, reduces UV-induced redness
Evidence: moderate. Pooled RCTs (4-12 mg/day for 8-16 weeks) show moderate, consistent gains in skin elasticity and hydration and reduced UV-induced erythema; wrinkle-depth effects are variable across studies.
Supports visual function and reduces eye fatigue
Evidence: emerging. RCTs in adults over 40 report improved visual acuity and accommodative function at 4-9 mg/day, plus one 30-day trial showing improved dry-eye symptoms; trials are small and short.
Modestly lowers triglycerides
Evidence: moderate. Pooled trial data show an average triglyceride drop of about 21 mg/dL in people with diabetes; no meaningful LDL change was found.
The skin and triglyceride signals replicate across small RCTs, which is more than most antioxidants can claim. But effects are modest, trials are short, and the famous '6,000x stronger than vitamin C' figure is a test-tube artifact with no bearing on human outcomes. No hard disease endpoints have moved.
What the experts say
Every position links to its source. We include skeptics alongside supporters.
Rhonda Patrick
Has discussed astaxanthin as an antioxidant of interest; specific graded position not verified.
Is it worth it?
Evidence (C+) sits below the leaderboard floor, so the worth-it grade is capped at C+ however inexpensive it is. About $15 a month at a common dose. Derived from the October 2026 worth-it model.
Typical cost
$10-20/month
Common form, not a brand recommendation
Dosage contextemerging
Most trials use 4-12 mg/day taken with a fat-containing meal; 4-6 mg is a cautious starting point. No official recommended intake exists.
Safety notes
EFSA considers combined diet-plus-supplement intake up to 8 mg/day safe for adults. Trials used 4-12 mg/day for up to a year with good tolerability and no serious adverse events. Avoid in pregnancy and breastfeeding (no safety data). Talk to a specialist first if taking immunosuppressants or hormone medications, and note possible overlap with 5-alpha-reductase drugs.
Longevity Lab Report
Astaxanthin news, graded when it happens.
The grade on this page stays free. The reporting goes further in the email: new studies, dose debates, and expert shifts on astaxanthin, including stories that never get posted here.
Frequently asked questions
Is Astaxanthin safe?
EFSA considers combined diet-plus-supplement intake up to 8 mg/day safe for adults. Trials used 4-12 mg/day for up to a year with good tolerability and no serious adverse events. Avoid in pregnancy and breastfeeding (no safety data). Talk to a specialist first if taking immunosuppressants or hormone medications, and note possible overlap with 5-alpha-reductase drugs.
What is the right dose of Astaxanthin?
Most trials use 4-12 mg/day taken with a fat-containing meal; 4-6 mg is a cautious starting point. No official recommended intake exists.
Is Astaxanthin worth taking?
We grade Astaxanthin C+ for worth-it at a typical cost of $10-20 per month. Evidence (C+) sits below the leaderboard floor, so the worth-it grade is capped at C+ however inexpensive it is. About $15 a month at a common dose. Derived from the October 2026 worth-it model.
Changelog
Last updated 2026-10-17
- 2026-10-16|New DRAFT entry, batch 3.
- 2026-10-17|Worth-it grade derived from the October 2026 worth-it model (same gated model as the leaderboard); applicability recorded for all records.